The finish on this cube is very smooth and shiny so it can get a bit slippy in certain circumstances (like the hot weather I'm enjoying this summer) so wipe it down before any speed solves if you have slippy hands. Also, if your puzzles are routinely scrambled by non cubers, ensure that they align the layers before twisting as I find that it's not overly forgiving regarding corner cutting by less experienced enthusiasts. That said, the twisting action is actually super fast and very smooth without feeling flimsy, light or loose. It's also slightly smaller than my 9x9x9 and consequently gets more use.