The good stuff: So far the sight holds tight to the rib of my 11-87 very well. It appears to be some average stamped steel, so I don't know whether that will change over time, but for low price I can stomach buying a couple of spares. Plenty bright for range and competition, particularly in sunny conditions.
The bad stuff: you get what you pay for. Considering the price point, I imagine I will be replacing it at some point.
Overall a good little gizmo. I haven't been able to find it online, so it might be a Walmart only kinda thing, but thats not really the end of the world. A widely available, low cost fiber optic sight?! Oh no, the horror