The Sightmark Ultra Shot PRO Spec NV/QD arrived shortly after I ordered it, I was expecting a decent quality holographic for the price, but (obviously to my mistake) I didn't realize it was a reflex sight, that said, the reflex sight is amazing. Unfortunately I haven't been out to shoot with it yet so I can't say it won't blow up in my face, but it feels sturdy enough to handle the 5.56 I'll be firing through it. I watched and read many reviews on it prior to buying and I have to say it's definitely held up to my expectations. When attaching to the weaver rail there is absolutely no wiggle room and it's made of very hard metal. There are distinct clicks that both lock in place, and allow you to hear when you switch reticles. I used a boresight to sight in the sight, and it holds it's zero whenever you switch to a different reticle (as long as you make sure it's fully on that reticle setting, not inbetween). It does look a little bit small, mainly because I was expecting a holographic sight, but the image of the dot, crosshair, circle reticle, and the other circle reticle are crisp and clear. It is very easy to acquisition targets with it and it comes with a smooth protector to keep the finish and glass from scratching or getting dirty. It also comes with an allen wrench to adjust the sight's windage and elevation (which both have distinct clicks as well), as well as a hex wrench to help it conform better to your rail. It does NOT take double AA batteries, as some of the videos led me to believe, instead it takes a CR1932 (watch battery), which are easy to obtain and are compact that you can store them with a tiny plastic bag and some tape inside of your lower grip. It states that on high power it will last about 48 hours, low power is more than sufficient though, even in broad daylight, I can't see much of a circumstance where I would need high power unless I was staring directly at the sun. On low power, I'll assume it lasts much longer, and it is easy to turn on and off with distinct clicks for each setting. It also came with two NV settings, NV1 and NV2, unfortunately I don't have any night vision now, but I picked out this reflex sight due to the fact that it's more sturdy than the versions without, I figured the extra 20$ would be worth the durability. The manual says it supports gen 1 - gen 3 night vision capabilities. The lowest power setting (there are 3) offers enough light at night time to see well, without blinding the user and causing the pupils to dilate. Overall, a great product that's well worth 100$, on top of that it's made in the USA.