I bought a used A-O about 3 years ago just to see if I would like shooting a .45 again.
I know that I put at least 4000 rounds through it with very few problems. The few I had, in the beganing, were due to my reloads. Once I found a load it "liked", no more problems.
For a relatively inexpensive gun, I have no complaints. However, I did have the trigger pull lightened up to two and one half pounds.