I've had a $50 BSA red-dot on my Daewoo DR200 for several years. Kind of funny to put such a cheap scope on a rifle like that, but I had it already & didn't have any other optics for the rifle at that time. It has decent glass, zeroed easily, and hasn't needed adjustment since then. Granted the rifle is pretty much a safe queen, and the BSA probably hasn't seen more than 200 bench-fired rounds.
It works well for what it is, but I don't think it could handle serious hard use or weather conditions. The thing I don't like about it is that the diameter of the unit is much larger than my Comp M3, and it doesn't feel as solid as the M3. For instance, the adjustment knob on the M3 clicks precisely through the settings, whereas the BSA knob has some play.
If you want REALLY inexpensive optics that work for a .22, BSA is probably a good bet. However, I'd recommend spending a little more $ and getting a decent mid-range scope which will last & can be transferred to another rifle if needed. Over the years I've tried to save money on optics and bought Bushnell, Tasco, Redfield, and Simmons scopes, all of which sucked the worst kind of unwashed hyena butt & never failed to fog up on me. I finally learned my lesson & ponied up the extra $ for good optics. The best "relatively inexpensive" scope I've ever owned was a 4x16 Weaver, which I still have & has never let me down from benchrest-shooting to deer hunting in snow, rain, and heavy brush.