Indeed, the cube, often associated with psychological reluctance recalling long hours in his chair trying miraculously perhaps, solve this abominable cubic monster, is a revealing astonishing performance: - The perseverence -mastery. It has now been two years that I know to solve the cube, and yes it has been hard, I learned with the manual. It is the first sight, indeed, incomprehensible and yet I understood what it is not unfeasible, but I confess qu'aujourdhui I do not know if jy arrive again. The new adversary once you've solved cube is well on time. Customize cube, ensure qu'iltourne faster, it's really nice. The labels will unfortunately take off on real Rubiks cube they are not resistant. In short, a real satisfaction when you finish. A buy and urgent challenge.