A bit stiff and catchy out of the box, but after a few turns, is really smooth. I haven't even lubed it. I have only solved it once, but its great fun and easy to turn each layer individually due to the magnets. Really bice cube, and a lot of fun!
Bonus that it looks really impressive, despite being as easy as a megaminx (which is as easy as a 3x3 pretty much)!
No parity or any of that stuff, means a lot of edge flipping, but the magnets really help in this. :)