I have the single track UV version and And It is currently my main over the Gan and Hong.
The cube is quite fast, faster than the Gan or Hong. It Feels more like the Hong than than Gan though it's turning is a bit crispier. it feels lighter than the hong in its turning but it's not as airy as the gan. It's corner cutting is very good. I would say that the gan is more forgiving and controllable but this cube has a better flow to it. I tightened this cube slightly out of the box and I can't even come close to forcing a jam or pop.
I have done ~100 solves on it so far and I only did a quick lube job but It should only make the cube better when I do.
I would consider this the best 5x5 out currently though some people may still prefer the Gan or even Hong so if you can try them out first. If you cant just get this. If you are interested in the double or triple versions you should look at other reviews as I have little or no experience with those. If you don't mind matte plastic and want to save a few bucks go for that one.