These have a poor design where blender meets base
591707
These have a poor design where blender meets base. The fins are plastic cover steel that the plastic desinegrates and it becomes useless. I replaced single serve unit three times, (really expensive). I don't think I ever got more than 50 uses. Now the plastic has come off base and won't engage at all. They offered me replacement parts for more than buying a new unit. I will never buy one of their products again.
1433752
I really wanted to like this blender, but was extremely disappointed in its ability to blend a smoothie.

PROS:
Easy to clean. I like that you can remove the blade mechanism from the jar.

CONS:
It does not fully blend down the ingredients so what you end up with are small bits of broken up fruit or vegetables that easily separate from the liquid. I ended up purchasing a different higher quality blender and it was easily able to blend the the ingredients into a smoothie like consistency. Also the suction cup feet at the bottom were very annoying. You have to apply a fair amount of force to move it around the counter.
3860067
I didn't open these for a couple of months and then I found they are too thick to use on my blender that they were recommended to purchase with the blender.  Not happy at all.
3039261
You can easily tell these apart from official Blender Bottle ones because they are further spaced apart. Still work though.
627002
Pour quality control.  Will replace these as sin as I can get our to a lighting store.  Should not have purchased online.  Legs are different lengths, glass isn't round!  It looks very crooked once made.  We changed or the legs and rotated them, tried everything to fix these things, but with uneven, out-of-round glass, there was no hope.  Expensive garbage.
3240291
I replaced my last Cuisinart stick blender with this one because the attachment broke after one year. I loved the ease of use of my old one. This one is a poor design. The buttons are very difficult to press and hold. Otherwise it's fine. But that's a huge issue for me as I use this for crafting cosmetic.
2065238
Like most JK owners, the OEM latches began to sun fade and would loose the ability to keep the hood from fluttering in windy conditions. So after some research, I chose these latches because of their look and design. Boy was I disappointed.  The concept is good, but a total failure in design. They were easy to install, but would not latch properly no matter how you adjusted them. The problem is the latch bottoms out on the catch before it can completely cam over and latch properly. And then they expect a little piece of plastic to keep it latched closed!  They really need to look at the geometry of these latches taking in to account manufacturing tolerances. I ended up throwing them in the garbage and buying some new OEM latches. I would not recommend these. (Yes.  Im a mechanical engineer. )
506902
This product isn't very well designed and isn't very reliable. I've had mine just over a year and I've recently had to replace the blade unit not because the blade got dull (I don't use it that much) but because the screw that held the blade unit on got stripped. You couldn't just replace the nut/bolt thing but you had to replace the entire blade unit. A rip off. Plus, the square-bottomed jar isn't that great--unblended stuff sticks to the sides and won't drop down into where the blade is, so it doesn't blend nearly as well as an old Hamilton Beach blender I found on the curb, with the traditional funnel-shaped jar. I'd say skip Cuisinart blenders and get something that's well-designed. It also makes SO much noise it wakes up the entire house when I make my smoothies in the morning. I'm sorry I bought it and won't replace it with another Cuisinart when it finally conks out.
1833583
This blender has a ring around the bottom where food gets stuck and doesn't end up getting blended. So, whenever I try to put walnuts in my protein powder shake they sit on the bottom in this crevice. When I turn the pitcher upside down to pour the bits come out and sink to the bottom of my glass. Also, it is hard to clean perhaps impossible because of this ring in between the blades and the bottom of the pitcher. I had to use a knife to poke out walnut bits when I cleaned it. Don't think the pitcher comes apart to clean either. On the positive side, it is a nice looking blender. For only $27.00 it is a good purchase but only if you just want to blend liquids and powders.
3956654
1) Tops do not snap on or off w/o breakage.
2) Hard to get off once frozen without lots of effort (Molds should be soft silicon, not hard plastic)

These are a nice idea but a bad execution that could have been much better with better design and materials.

Nearly all broken after first few uses

DO NOT BUY

NOTE: Customer service was good and offered to replace them after they saw this review. I told them not to bother since it was not a defective individual product but a defective design and another set would simply break again.
1217453
I bought these for a project that doesn't require precision but I'm still shocked at how bad these wheels are. The bearings came too crooked to even fit onto an axle so I had to remove them and reset them. The rubber molding is wobbly and has a high spot when spinning (runout) I imagine if I actually used these wheels riding on a scooter I would be bouncing down the road as if they had a flat spot. I didn't return these because for my project it doesn't matter but I wanted anyone who would use these on a scooter to know not to get these.
1979459
The Black & Decker Fusion is worthless. I have purchased 2 of them and both broke. They work fine for a few weeks and then a small piece of ice or fruit gets caught in the blade and it fries the blender. It's too bad the bottles don't fit other machines as they are the only thing that is really good. I highly suggest spending another $20 or so and getting a better personal blender (I bought the Ninja Auto IQ and LOVE it).
3318239
The base for the blender would not snug up to this jar, oster sent me another bottom still did not work, I have ordered another jar and bottom that come together to see if they will work, I think the jar is defective but would not say for sure until I get another to check and see if it is the pattern on the jar.
4879176
Extremely difficult to get these just the right distance apart from each other so that they spin properly. Also, with the magnetic board in the upright position, these seem to slide down a little so what was spinning properly, slips out of place.

I would not recommend these. Buy the ones on a plastic base that you stick in to so that the gears stay in place. I'm a grandmother and this is okay for when my grandkids come over for a little visit but as a parent I had the other kind which was much better for my kids growing up.
1709842
The whisk attachment works fine but the blender attachment is such a bad fit that it seems like it's the wrong one completely. Keeping it attached to the handle requires I hold it on so hard that my arm gets tired, which is saying a lot because I'm pretty strong. The rotation is so weak that it can even make bubbles in soapy water. Either mine is defective or it's just a piece of crap. I bought it to make mayo in a jar, but then ended up having to put it in a regular blender because after 10 minutes of blending with this device I still had streaks of loose oil that weren't even mixed in. I could have made better mayo blending with a fork.
3211102
Disappointing as when making a smoothie I have to take the blender off the base several times, and shake it before the smoothie is mixed to my satisfaction.
4574231
I am returning these cups because they lost their shape the first time I washed them TOP Rack in my dishwasher. They won't fit the blender blades or the tops. This must be a knock off product. I'm now purchasing from the manufacturer. NOT HAPPY.