I think its kind of a crap shoot. Like you I read the good and the bad here about Gamo scopes. My personal experience has been good. My Hunter Elite, Gamo 3-9X50 Mil dot, now about three years old with a couple of thousand down range is still going strong. The only adjustment I need to make is if there is a significant weight change with pellet brands I am shooting and that's usually only for elevation. Probably only a quirk with my gun but I do notice my rifle needs a few, I'll call them warm up shots then the rifle goes right back to where I left off.
W