In nutshell: almost impossible to turn because it falls apart instead. Most probably some manual maintenance is needed.

Beautiful cube, triangular faces have great spin but the spins of square faces that are deep cut of the 2x2 lock because the 2 pieces of each half that is part of the spin have internal burrs, I had to remove the pieces, sand and polish. After that the cube was perfect.

Não é o que eu esperava porque não gira o como um 2x2