I’ve got five of them. One each of the 6 MOA on aShadow 2 Compact, an M&P 2.0 compact. And an M&P gen 1 that I got milled. I have a 3 MOA version on my Ruger Mark IV and my Smith and Wesson Victory.

I really love the 6 MOA. I have astigmatism in both eyes, right eye is worse than left. Left sees the 6 MOA as a perfect dot and the 3 MOA as a dot with a flair. Right eye sees the 6 MOA as a dot with a few flairs and the 3 MOA as two dots with flairs.

Most dots are unusable with my right eye, but the Defender 6MOA is great with my right eye and perfect in my left. I don’t know if it’s their emitter or sole coating on the glass, but somehow they look great to me. The 3MOA is usable with my right eye since I know which dot is zero and which dot is just a ghost image (and it helps that the ghost image is dimmer than the real one). Again, I’ve looked through other spots, tried friends dots, and most don’t work at all for my right eye. But the defenders do.

Also, as for reliability, through the 9mm handguns I’ve put at least 15,000 rounds down range and all defenders have held zero and not failed. I’ve put around 20k 22 rounds down my two 22s, but they are 22s so obviously no issues either zero or breaking.