Pieces break too easily. The second piece I removed from the main ...
342714
Pieces break too easily. The second piece I removed from the main mold easily broke even though the instructions require the piece to be bent.
2201209
Broke the first time I tried turning the pieces. Absolutely ridiculous that they break when using them. We ordered 500 for a trade show and now I might have to pull them since they will be extremely embarrassing to give out.

Too bad bc they are a great size.
51560
The primary junction point on this figure where the two halves join broke when I tried to combine the pieces, as the joint was fused on one section, resulting in a loud SNAP when pressure was applied. I've since used superglue to remedy the situation as I don't actually need this figure to move at all, but YMMV so be advised.
163762
Parts break easily, frame is fragile. Not for active toddlers.
3252296
And well... it broke lol as expected but it broke into all the primary pieces so I just stuck it back  together and it works fine. Wouldn't recommend trying that. I bought 2 more
4699002
at first glance I just love the colors and the stoneware but when I finally bought them this product easily breaks it doesn't take much of a bang for it to break because when I got my package I opened it up only to drop two a short short distance and they broke very easily.
2698885
Pieces are not built to the necessary tolerances. They do not stack easily, and will always require the help of a strong adult.
4820904
They break easily. I've had to replace them 3 or four times, granted it was part my fault for carelessness, but they just are not very durable. I'm going to find another brand.
4977734
The first package arrived and the center conductor (pin) on one plug was broken and floating around in the package.  The second one arrived intact so I installed it.  Immediately, the center pin broke off and the plug fell out of the jack.  Today I fished out the broken piece out of the jack which was a bit of a challenge.  I had to drill a 1/2" hole above the jack (the back of a brand new 70" TV, which I was very reluctant to do), and used a paper clip to push it out from the back side.  It came out easily (thankfully) and I quickly found out why it was so fragile to begin with.  The center pin is made of plastic and then plated with gold.  Do not buy these!
2555711
Break apart so easy and the pieces are terribly annoying to find. Bought them for my 2 year olds and the suction arms quickly popped off and became a choking hazard.
3882915
Its a fine set, but I have already broke some of the smaller ones too easily, and every single one of the security bits has the hole off center so some of them are unusable. Would not buy again. only good for occasional use.
16947
I'm a little biased because I got a bad one; it arrived with 2 pieces glued together.  But aside from that, just generally moving the other pieces around I had a couple of pieces pop off.  I immediately returned it.
4396080
They come apart too easily. Drives me nuts. I'm really glad I bought another set (different brand) at the same time. They cut ok, I guess, but don't open them too much or they'll practically disintegrate in your hands.
4938030
They break easily, I've cracked 3 of the bottom trays so far. That's after using it one time. You're better off buying a higher quality set.
4234926
Bought twice. Both times they have snapped really quickly on the top, the part that goes over the head. Making them useless as it's not 2 pieces. Very unhappy.
2089984
This is the second cube my son has. The first one as well as this one the pieces came apart.  We replaced it and the same thing happened with normal use.  Thanks
2060310
While I like the overall design and size, it is too fragile to give more than 3 stars. The cage lost two parts as I was assemblying it and snapping parts together. Another broke today, 3 months after starting to use the cage. Fortunately there are companies that sell parts for this cage.