Most of the cubes in this set are fun and interesting to play with, however, if you want to have something that turns well for the size, this may not be for you. These puzzles are more used as a novelty or for fun. The penrose cube and the round 3x3 both turn well enough for what they are, however the 3x3 catches a lot due to sprues within the core that were not removed in manufacturing. As such, do not expect them to turn exceptionally well. the 2x2 is a bit rough but works fine and the same goes for the pyraminx. Overall, this is a fun way to bring cubes out without the hassle of needing to take up much space in a bag, however do not expect them to turn well.