Not many edge turners exist. There was the original helicopter cube which now only lives on in knock offs, I was lucky enough to get an original when it came out, but didnt overlook this puzzle, although it adds so little to the solve that it is negligible, the appearance is beautiful and the movement must be felt to be believed. Furthermore, the original helicopter cube was a bit bigger than standard which was fine, but the nice compact size of this helps differentiate them more.
