Good so far - Viridian Weapon Technologies RFX11 1x16-22mm Reflex Red Dot Sight

Two of these units were purchased. One for a Ruger 57 and one for a Ruger Security 9. The green dot is bright and sharp and the auto brightness seems to work well. They appear to be holding zero but I have not used them extensively as of yet. The auto off and shake awake features are working well. The dot turns off after two minutes and turns on with just a touch of the weapon. Only time will tell if they will hold up.