Just got my two Revels in the mail today. I have no issues to report as far as build quality goes. They seem to be in perfect condition. With that said this is a great mouse. I was using a DM1 Pro before and I must say I haven't really noticed a difference other than it being a bit more snappy in game. It's also a bit smaller than the DM1. Amazing mouse, seemingly thought there are some quality control issues that others have reported. This was not the case with either of my mice.