Things I liked: I ordered two of these - one for my Bronco ( along with the front riser kit ) and one for my son's IZH-61. Mounting was easy and fast, no problems at all, Quality seems fine. I have a huge selection of hex wrenches, but a lot of people probably don't, so they'll require a trip to the hardware store.
What others should know: I'm guessing that the sight has changed very recently - earlier reviews indicated that the aperture was friction fit. That is NOT the case with the ones we bought - they're threaded, and a Williams .050 replacement aperture screws in just fine!