Solid optic, holds zero - SIG SAUER OPMOD ROMEOZero Reflex Red Dot Sight

I've put about 400 rounds through my shield plus performance center and the zero is held. The dot is so crisp that I can see it clearly without my glasses and my slight astigmatism. I'm not going to knock this because you have to remove it to replace the battery, I knew this before I bought it. The only thing that's a little difficult is consistently pressing the adjustment button. It's in an awkward spot that if you put your finger too far in you just leave prints on the optic. Overall, I knew what I was getting in to and I'm very happy.