I have Trijicon night sights on five of my Glocks, four of which I used the GL01 model. I am not a fan of their HD sights as I prefer the standard patridge sight configuation. As for the GL01's, I think they are among the best for Glocks. Snag free, low profile, and the lamps are not so large that they take your attention away from the target and your sight picture. Add to that the fact that they let just the right amount of light to pass by the front blade so you can center it in the rear notch.