I bought my Backup 45 ACP about 3 months after they were offered (1996?). I shot between 500-750 rounds through mine and never had a problem with it......fast forward to four months ago after the gun sat up for 4+ years without being shot......
I started having all sorts of FTE and ammo primers failing to detonate. I discovered that you can buy parts for the gun through Brownells, now. I replaced the hammer spring and extractor spring, and it works like a champ, again. I've only shot factory FMJ, and it is definitely a STOUT gun. I've sliced the webbing between my thumb and index finger with the slide a couple of times (when at the range, I usually use gloves, now). The trigger pull is heavy, but for it's intended purpose, it's not a problem. The gun is NOT a range gun, but a personal defense gun. Still, on slow fire, I can put 50 rounds into the head of a B-27 target at 10 yards without missing.....for simple two-handed, point-and-shoot defensive shooting, I can nail a B-27 target every time at 10 yards and probably 80% at 15 yards (not aiming/less than a second per shot).....A recently developed issue (after over 1000 rounds through the gun) is that my trigger pin is starting to creep. I'm going to have to find a way to avoid this pin from creeping. It hasn't caused a problem, yet, but I see its potential.
Miscellaneous notes:
1) Recoil is brutal, and unless you are used to shooting the gun, you can stray all over the place....I rarely will shoot it one-handed
2) I find that I need to keep the slide well lubed, or I can get a FTF.
3) If you get a primer that fails to go off, you can pull the trigger and hit it again, usually firing the second time
4) Grip screws vibrate loose VERY easily (I lock-tited mine)
5) It is NOT a gun that is enjoyable to shoot, especially for anything over 20 rounds.
6) It is heavy (I carried mine for two weeks, through 22 states, on my motorcycle once.....couldn't really tell it was there in my jacket pocket)
That's all I can think of on this gun....In many ways, I wished I'd gotten it in 9mm instead of 45ACP......Prices listed above are what I typically have seen, too.