My MGC Elite 2x2 was a bit too tight and needed loosening and fast lube to fit me.
4x4 - 7x7 were fine out of the box. 4x4 was the worst, a bit slower more sandy feeling. Gave a couple drops fast lube, and some break-in, and now it is good.
MGC 4x4 - 7x7 all have stronger magnets in center than outer layers. I like that, some don't. The YJ Zhilong Mini 4x4 and 5x5 have more even balanced magnets and are pretty good as well - but smaller. 4x4 is 56mm I think. But I use Roux, and slice moves, so MGC is perfect for that.