FWIW, many years ago on a visit to a Jeeping friend in another state I had an opportunity to shoot his Colt Officers ACP and I fell in love with it. He estimated that he had between 10,000 and 15,000 rounds through it and he said he had never encountered a malfunction.
At the time I couldn't afford what Officers ACPs were selling for, but I found a deal on the same pistol in a plain wrapper: the M1991A1 Compact. I bought it instantly, and I still have it. Looking at my shooting diary for that pistol, early on I had one malfunction -- a failure to feed the last round out of 7. The OACP was designed to use 6-round magazines, so the 7-rounders were a kludge and prone to failures anyway. I have since stayed with Colt or Check-Mate 6-round magazines and had no further problems.
Over the years, I have added another M1991A1 Compact that was a rescue (it had been heavily Bubba-fied, and I got it super cheap from an FFL friend who had taken it in without realizing how badly it had been mangled). I bought an entirely new (used) Colt top end and rebuilt it to factory configuration. Later, I added a Mark IV Officers ACP (the real thing), and then a Lightweight Officers ACP Enhanced. No problems with any of them.