This version of the X2H has been good for me, it’s my main mouse. Only downside for consumers buying this version is the fact that there is NO application to fix dpi and such, however this is all done on the screen of the underside of the mouse. This mouse is great for those who do not like excess applications just for their mouse. Comes with a 4K dongle, so that is pretty nice. The overall build quality (the unit that I have gotten) has been holding up quite well after just under 6 months of use, and the shape is good for what’s written, flat front and a higher back hump. So far it’s been well, only time will tell what wear and tear will do to this mouse. (Also so far no scroll wheel jumping or double clicking but I’m a bit sceptical)