I spent time looking past the feature list while researching the Ninja CM371 Review, because this coffee maker has a lot going on. It can make classic coffee, rich coffee, iced coffee, and rapid cold brew. It also handles sizes from a small cup to a full carafe, so it looks more flexible than a normal drip machine.
What caught my attention is that the CM371 tries to solve a common kitchen problem: one person wants hot coffee, another wants iced coffee, and someone else wants cold brew. Instead of keeping three different coffee tools around, this machine puts those jobs in one unit. But I also found a few things worth knowing before buying it, especially around cleaning, brewing consistency, and the glass carafe.
What Is the Ninja CM371, Really?
The Ninja CM371 is a hot and iced coffee maker with four brew styles, eight brew sizes, a removable water reservoir, and a 12-cup glass carafe. It uses ground coffee, so you do not need K-Cups or other coffee pods.
The basic idea is simple. You choose the size and brew style, add coffee and water, and let the machine handle the brewing. The extra modes are what make it different from a basic 12-cup coffee maker.
| Feature | What You Get |
| Brew styles | Classic, Rich, Over Ice, Cold Brew |
| Brew sizes | 8 sizes |
| Carafe | 12-cup glass |
| Water system | Removable reservoir with auto-metering |
The Amazon listing currently shows a 4.6 out of 5 rating from about 19,780 ratings, with 400+ purchases reported in the past week. Those numbers can change, but they give a useful snapshot of current buyer interest.
Ninja CM371 Brew Styles: Where the Machine Gets Interesting
The four brew styles are the main reason I would look at the CM371 instead of a plain drip coffee maker. You can switch between everyday hot coffee and colder drinks without changing machines.
Classic and Rich Coffee
Classic is the everyday setting. It makes the most sense when you want a normal cup or pot of coffee.
Rich is there when you want a stronger taste. I like having that choice because coffee strength is very personal. What feels perfect to one person can taste weak to another.
| Brew Style | Best Use |
| Classic | Daily hot coffee |
| Rich | Stronger-tasting coffee |
| Over Ice | Iced coffee |
| Cold Brew | Smooth cold coffee |
One mistake I would avoid is assuming that choosing Rich will fix poor coffee. The beans, grind, coffee-to-water ratio, and freshness still matter. A stronger setting cannot rescue stale grounds.
Over Ice Is Not the Same as Cold Brew
This is an easy point to miss.
The Over Ice setting is meant for iced coffee. The machine brews coffee designed to go over ice without becoming too weak. Ninja markets the CM371 as making bold iced coffee that is not watered down.
Cold Brew is a different process. Ninja says the CM371 can make cold brew in as little as 10 minutes.
That speed is convenient, but I would not compare it directly with a traditional long-steep cold brew method. The machine is using its own rapid brewing approach. If you are a serious cold-brew fan, that distinction matters.
The Eight Sizes Are More Useful Than They Sound
The CM371 is not limited to making a full pot. The machine offers eight brew sizes, including smaller cups, travel sizes, and different carafe amounts.
This solves one of the annoyances I often see with large coffee makers: wasting coffee when you only want one serving.
| Situation | Useful CM371 Choice |
| One morning cup | Small or regular cup |
| Coffee for a travel mug | Travel or XL travel size |
| A few people | Quarter or half carafe |
| Family breakfast | Full carafe |
The flexibility makes more sense for a mixed household. One person can brew a mug while another can make enough coffee for several people later.
Still, remember that “12-cup” does not mean twelve giant mugs. Coffee maker cup measurements are usually smaller than the typical mug sitting beside your computer.
Ninja CM371 Water Reservoir and Daily Setup
The removable water reservoir is one of those features that sounds boring until you use a machine every day. The CM371 uses a removable reservoir with auto-metering, which Ninja says senses the water amount so you do not have to keep measuring it.
That should make daily brewing easier.
However, customer feedback made me pay closer attention to the reservoir design. Some owners say the shape can make certain areas difficult to clean. A customer review on Macy’s specifically mentioned hard-to-reach spots inside the reservoir.
| Daily Task | What I Would Do |
| Fill reservoir | Remove it and fill at the sink |
| After brewing | Empty leftover water when practical |
| Deep cleaning | Pay attention to corners and hard-to-reach areas |
This is one of those small details that product photos rarely show well. A water tank can be easy to remove but still annoying to clean.
What Is the Ninja CM371 Like to Use Every Morning?
The appeal becomes clearer when you picture a normal morning.
You wake up and want one cup. You do not need to brew a whole pot. Another day, you have guests and want a larger batch. Later in the week, you want iced coffee instead.
The CM371 can cover all those situations with one machine.
It also has a 24-hour Delay Brew feature and a keep-warm function.
| Feature | Why It Matters |
| Delay Brew | Helps prepare coffee for a set time |
| Keep Warm | Keeps brewed coffee warm after brewing |
| Small-batch brewing | Avoids making a full pot for one person |
I would probably use the delay feature more often than some of the flashy settings. Being able to prepare coffee around a morning routine is one of those conveniences that becomes part of your habit.
Ninja CM371 Review: How Good Is the Coffee?
This is where I would keep expectations realistic.
Ninja describes the CM371 as using Thermal Flavor Extraction, which it says provides even saturation and controlled temperature during brewing.
But coffee quality is not controlled by the machine alone.
The beans matter. So does the grind. Water quality matters. The amount of coffee matters. Even how long your coffee sits on the warmer can change how it tastes.
Independent testing also raises an important point. Consumer Reports found that the CM371’s brew performance fell short of its recommended temperature guideline of 195°F or higher maintained for five or six minutes. At the same time, its testing found the machine especially convenient to use, including its controls, reservoir, filter, coffee visibility, and cleaning.
That gives me a more balanced view than simply saying the machine makes “great coffee.”
It has a lot of control and convenience, but temperature performance is something buyers who care deeply about extraction should consider.
Cleaning the Ninja CM371 Is the Part I Would Not Ignore
Coffee makers need more cleaning than many people expect.
The CM371 includes a permanent filter, which means you can avoid buying paper filters for normal use. The included package also contains a 12-cup glass carafe and Ninja Smart Scoop.
The reusable filter saves waste and ongoing filter purchases, but it also means you need to rinse the grounds out after brewing.
| Area | Why It Needs Attention |
| Permanent filter | Coffee oils and grounds collect here |
| Water reservoir | Can develop buildup if neglected |
| Carafe | Coffee residue can affect taste |
| Brew basket | Grounds can spill if not seated well |
Customer feedback is mixed. Some owners praise the design and ease of use, while others report grounds getting outside the filter area. Lowe’s reviews include complaints about grounds spilling and inconsistent brewing.
That does not mean every CM371 will have the problem. It does mean I would pay attention to filter placement and cleaning instead of assuming the machine is completely maintenance-free.
The Glass Carafe Has a Few Trade-Offs
The included carafe is glass, not thermal. Consumer Reports lists the CM371 as having no thermal carafe or mug.
I actually think glass is fine for many kitchens. You can see how much coffee remains, and it fits the classic drip-coffee setup.
But it is also something you need to handle with care.
| Glass Carafe Benefit | Glass Carafe Drawback |
| Easy to see coffee level | Can break if dropped |
| Familiar drip design | Does not provide thermal insulation |
| Works with keep-warm plate | Coffee can lose heat over time |
Customer reviews also include reports of leaking around the carafe. One Lowe’s reviewer said the carafe leaked at the rim. That is an individual report, not proof of a widespread defect, but it is still worth knowing about.
What Owners Like About the Ninja CM371
After looking through current customer feedback, the same strengths show up again and again.
People like having several coffee styles in one machine. They also like the ability to make a single cup or a larger amount. Some users mention good coffee taste, easy programming, and the convenience of avoiding pods.
A household with different coffee habits is where this design makes the most sense.
One Lowe’s review described a household where different people wanted regular strong coffee, flavored coffee, and cold brew. The reviewer liked being able to serve those different preferences with one machine.
That is a better reason to buy this coffee maker than simply counting features.
What Owners Complain About
The negative feedback is useful because it shows where expectations can go wrong.
Some owners report grounds spilling, carafe leaks, difficulty with the water reservoir, temperature concerns, and inconsistent full-pot brewing. Recent reviews even include reports of machines stopping before completing a full carafe.
| Reported Concern | What It Means for a Buyer |
| Grounds outside filter | Filter setup may need extra care |
| Reservoir hard to clean | Maintenance can take more effort |
| Carafe leaks | Check the carafe after setup |
| Full-pot inconsistency | Test the machine early during the return period |
I would not treat every negative review as proof that the product is bad. Coffee machines can also be affected by setup, cleaning, water, grounds, and user habits.
But I also would not ignore repeated complaints just because the overall rating is high.
Common Ninja CM371 Mistakes I Would Avoid
The first mistake is trying every setting without learning what each one does.
The second is using the same coffee dose for every size. A small cup and a full carafe need different amounts of coffee.
The third is treating the machine like it needs no cleaning because it has a permanent filter.
| Mistake | Better Approach |
| Use one coffee dose for every size | Follow the size markings and adjust taste |
| Treat Over Ice like Cold Brew | Use each mode for its intended drink |
| Ignore the water tank | Clean it on a regular schedule |
| Assume Rich fixes weak coffee | Check beans, grind, and coffee ratio |
| Leave old coffee sitting too long | Brew only what you plan to drink |
One lesson I keep coming back to with coffee makers is that more buttons do not automatically mean better coffee. The best results usually come from learning two or three settings that fit your routine.
Ninja CM371 vs. a Basic Drip Coffee Maker
This is probably the most important buying question.
If you only want a basic pot of hot coffee, the CM371 may offer more functions than you need. But if you switch between hot coffee, iced coffee, and cold brew, its extra modes become much more useful.
| Need | CM371 Fit |
| Basic hot coffee only | More features than necessary |
| Hot and iced coffee | Strong match |
| Rapid cold brew | Useful match |
| Single cup and full carafe | Strong match |
| Coffee pods | Not needed |
The key is to buy based on your habits, not the feature count.
If you never drink iced coffee, the Over Ice and Cold Brew functions may spend most of their lives unused.
Is the Ninja CM371 Easy to Learn?
The control system looks complicated at first because the machine does several jobs. But Consumer Reports found the CM371 especially convenient in its testing, including the controls, reservoir, filter, remaining-coffee visibility, and cleaning.
That lines up with the basic design.
Once you understand the difference between brew style and brew size, the machine becomes much easier to use.
| Control | Question to Ask |
| Brew style | What type of coffee am I making? |
| Brew size | How much coffee do I need? |
| Strength | Do I want Classic or Rich? |
That simple mental model makes the machine less intimidating.
Who Should Consider the Ninja CM371?
I would look closely at the CM371 if your household has mixed coffee habits.
It makes sense for someone who wants a regular coffee maker but also wants iced coffee and quick cold brew without buying separate equipment. It also makes sense if you often switch between a single mug and a larger carafe. Those are the areas where the machine’s design has real practical value.
I would be more cautious if your only goal is the simplest possible hot coffee maker.
A simpler machine may be easier to live with when you do not need the extra modes.
Who May Want a Different Coffee Maker?
The CM371 may not be the right fit for someone who wants a thermal carafe, since this model comes with glass. Consumer Reports also noted that its tested brew performance did not meet its recommended temperature guideline.
I would also think twice if you dislike cleaning reusable filters or if you want a machine with very little maintenance.
And if you are buying it mainly for traditional slow-steeped cold brew, I would compare its rapid cold-brew approach with the method you already enjoy.
My Final Take on the Ninja CM371 Review
After looking closely at the design, specifications, independent testing, and customer feedback, I see the Ninja CM371 as a flexible coffee maker rather than a simple drip brewer. Its strongest idea is letting one machine handle hot coffee, iced coffee, cold brew, single servings, and larger batches.
The main lesson for me is not to buy it just because it has four brew styles and eight sizes. Buy it if you will actually use those options. The machine has some impressive convenience features, but customer feedback also shows why cleaning, filter setup, carafe condition, and brewing consistency deserve attention.
If your coffee routine changes from day to day, the CM371 has a strong practical case. If you only want one simple pot of hot coffee each morning, its extra flexibility may not add much value.
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