The product I got was branded as "Stanley," not "National Hardware," but all the same, it does what it says on the box, it's easy to install, it's inexpensive, and it seems solidly built. First of all, functionality. Does it work? I can unequivocally answer "yes" to that one. The optics are of decent quality and if you look from the inside out, you get a good, clear, wide-angle view of the area outside your front door, but if you try to look from the outside in, you see practically nothing at all, eliminating the need for one of those little flip-away covers that people sometimes put in front of peepholes of lesser quality. As for installation: what you don't see in the picture is that the peephole is made of two parts, one threaded on the outside and one on the inside. You have to start by drilling a 1/2" hole in the door. I was a little nervous about this because I knew my door is metal on the outside, but my perfectly ordinary Ryobi handheld drill had no trouble with it. Just be sure not to use a brad-point bit on metal, since it will just damage the brad point; brad-point bits are for wood. Then, you insert the part with the lens from the outside, and the other bit from the inside, and you thread the inside bit over the outside bit. The two little notches are the exact right size for a quarter used by way of a screwdriver, which is probably what you want to do, unless you have a 1/2" screwdriver (do those even exist?). I would like the flange on the inside to be a little larger, the better to cover up any scratches you may make in the surrounding paint, but that's really a minor issue. Given the solid machined metal construction and the decent quality optics, the price seems perfectly reasonable. And did I mention the solid construction? I hadn't expected it, but this thing really does seem to be made of machined brass, and the nickel-plating is strong and thick enough that it didn't chip off anywhere during installation.