Got a great deal on a used one. For what I paid, it was worth it for the Fast Fire alone, let alone the 5x prism. Its essentially like new... It has the CQ reticle, which can be used for 5.56 and 7.62 NATO. Supposedly it is shockproof, waterproof, and fogproof. Trying to take phone photos through this is pretty challenging. Reviews I saw indicated that eye relief is really short, and it is, and I think thats what makes it a lot harder. Its easy to take photos through, say, an EoTech EXPS-2 or an Aimpoint Pro. That said, the reticle works great with no illumunation, and can do multiple levels of red and green. The green is on highest, the red is on the lowest. The reflex red dot is small, but it works well. Part of the reason why I bought this (besides a good price), was to get one of these little reflex sights and see what it would be like on a rifle itself, as a super-small, really low profile sight... Plus to use it anywhere else I choose (or have basis to buy a trijicon RMR if I desire). It has three levels of brightness plus an automatic version, and a 3 MOA dot. I personally like full cowiness; of course on the top of a scope there is none, and that's OK. Not sure if I mounted it on the top rail, if it would be too low. Time will tell. But it works well. For reference, the top is the Burris 5x prism on a Sig 716. The bottom is an Aimpoint PRO on a Colt M4. The Sig and the Burris are both big and heavy, but thats good for 7.62.