I just got this today. Initial impressions: It is noticeably smaller than other megaminxes, but I don't think that's as much of a problem as I might have expected. Out of the box it is probably the smoothest megaminx I've tried, including after setup. Normally when I change anything with megaminx it results in a temporary increase in times, but I've been running on average around 3:20, my first solve on this out of the box was 2:59. I'm inconsistent enough that that's not really notable, except that it was my first solve on this puzzle. I have some 3x1.5mm n52 magnets that will be a tight fit, but I think they'll work. Thickness of the plastic between the magnets is 0.089".
I'm bothered by the lightness of the tan pieces on my Yuxin megaminx (too close to the white). This has a darker tan, and major kudos to X-man for including extra black pieces! Not sure exactly how I'll use them, but I'm pretty sure I will. Maybe just replace grey, maybe move grey over to replace tan and replace grey with black. Might even replace white with black, and grey with white.
Edit: Only 5 solves in, but I can definitely say that this is the best puzzle out of the box that I've ever owned. I still think that my Yuxin 5 M is a better puzzle, but I had to magnetize and set that one up. I've done nothing but solve this, and I'm seriously wondering if I even want to bother putting magnets in it, it's that good.
Purchased from Magiccubemall, if that matters.