Fast, high-performance magnetic 7x7 for $20? No-brainer. Outer layers can be further improved with Florian modding, inner layers can be further improved with dorito modding. The mods take a few hours together, but are cheap and significantly improve the cube. My one gripe is that the inner layer magnets aren't quite strong enough to prevent turning when I turn the outer layers even slightly inaccurately, but I hear the AoFu has stronger inner slice magnets so I think I'll give a shot. Also, this cube pops occasionally when I have it loose enough to be fast, which is very annoying as the puzzle is not easy to reassmble.