Valk 4M (strong)
When turning each layer slowly, the cube has a very comfortable, stable smoothness. When turning faster, a pleasant, light touch of crispness can be felt. The cornercutting is quite flexible and is on the level of the other top 4x4 cubes. This cube, which is used and recommended by world-class cuber Mats Valk himself, will certainly delight beginners and experienced professionals alike.