IMHO, this is currently the best Megaminx on the market (and I have all the current highly regarded Megaminxes for comparison). Straight out of the box, it’s a joy to use. It feels quite loose, but, because of the magnet arrangement, it doesn’t feel unstable and, so far, I haven’t had a corner twist.
I purchased both the Standard and the Large sizes, to see which I preferred. For comparison, the Standard is identical in size to the DaYan Megaminx V2 (and to the GAN Megaminx). The edges of the Large are approximately 1.5mm longer than the edges of the Standard, but, while this doesn’t sound much, in practice, the Large does feel significantly bigger. That said, the YJ YuHu V2 Megaminx is even bigger still, being around 1.5mm longer on the edges than the Large.
The magnets do a great job of keeping the edges aligned, with a noticeable (quiet) ‘click’ as the edges snap into place, but this is never intrusive.
Overall, I highly recommend this Megaminx. I would describe the size of my hands as average and I prefer the Standard size, although I’m quite happy with the Large. If you have larger hands, the Large might be better.