The 2x2 and 3x3 work perfectly fine, however they are cheap. These are made with a hard plastic but the texture is soft, and the cubes can corner cut but they aren't the best when you do it quickly. I give it a 5/10 over quality, because they could be better, but they are definitely worth the price. They can move very smoothly without any grinding or tough moves. If you are looking to solve it in 20 seconds, I don't recommend as the corner cuts are not the best. However if you are a beginner these are great, because they can help you learn notations and how to move the cube in general.
Overall great cubes for the price, but if you are looking for a very rapid moving cube this isn't helpful.
