I bought this lot after trying that of a friend. The overall quality of the cubes is good. The 5x5 is excellent fluid, precise, tolerant, etc ... A real pleasure! The 4x4 is very good. For the 3x3, I'm better known, and 2x2 is classic. However for the price, this lot is a very good deal (if only for the 5x5)! Besides they are beautiful, like that white!
NB: Note that all these cubes are adjustable (with conventional single screwdriver) to suit your style and taste.