I have one on an Atlas Athena. So far I like it. I've only had it a month but it has held zero through about 500 rounds. Dot is bright and decently shaped even with my astigmatism. Glass is good, no distortion at the edges and doesn't seem to add any magnification that I can see. It does have a slight blue tint but no worse than the Romeo 3 Max. Buttons are good, they have a tactile feel when pressing them, I'd say on par with the 507 Comp, definitely better than the SRO. It seems pretty good overall.
I don't like it as much as the 507 Comp, but I do like it more than the SRO, that's just me, I hate the SRO glass. I'm not sure why but the SRO glass just doesn't seem clear at all, and I've tried several. I'm not saying it's better than the SRO, but I personally prefer it over the SRO.
I bought it on a total whim and I'm not disappointed. I'm going to use it for this upcoming season with no reservations.