The ShengShou 3x3 clock is really not difficult, especially if you can already solve the ordinary clock, the method is the same but with one less gear, pin and 3 less clocks to solve! The turning was actually better than I remember from the original ShengShou clock which they are now referring to as a 4x4 clock (although I am not sure I agree with that as I would say that the ordinary clock is a 3x3 clock, a 4x4 clock should have 16 clocks). Nonetheless, this is an interesting new release which has not been mass produced before. Buy it here