Well, not a huge sample, but I bought my first Leupold in 1986, still have it - VariX III 1.5-5x20. Now up to 9 rifles from .223 to 350 RemMag with Leupolds. They all work. They all do what I expect a scope to do. Have never had to send one in for repair or service. I don't fiddlefuck with twirling stuff, just sight in and leave them alone. I'm very happy with the product that Leupold puts out. Oh yeah, have a couple of their spotting scopes too.