I have the 5-20 Version. It's on a 22-204R AR that I put together recently. I haven't had a whole lot of time behind it, but the glass quality is equal to its price point/competitors. Tracking seems decent. I only have 65 rounds down the barrel, and I've loaded up some test ammo to try and narrow down some loads. Once that's done, I can then use the ballistic feature. Ultimately, a laser etched turret with yardage marks ought to be nearly as effective, and be only minimally slower to use.