I think it's a little bit of exaggeration to say there have been "a lot" reports of the QA's breaking / not resetting. I believe there have been several reports on this forum and that's a drop in the bucket compared to the number of QA's out there.
For what it's worth, I have a QA with nearly 8,000 rounds through it without a problem. While I understand Jim's concern about pulling the trigger and having nothing happen, any gun can have a situation where it breaks and the shooter is left holding a hobby hammer. I had a revolver. It was a S&W 686+ Mountain Gun. Revolvers are supposedly the most reliable form of handgun, but the hammer disconnected from the spring and it was literally useless. Does that mean revolvers are not reliable? No. It was just a gun that broke.
There are some who like the "second strike capability" of the DA/SA (AS) trigger. I think second strike is over-rated. If a round does not go off, I'm doing the tap and rack drill and getting rid of the round. I'm not going to waste my time with a second trigger pull on what is likely to be a dud.
That said, what's best for you largely depends on personal preferences. I learned to shoot on DA/SA pistols and I don't like them. I prefer SA pistols and pistols that offer consistent trigger pulls like the Glock and Walther P99 QA. -Others here really like DA/SA pistols. It's not a matter of one being definitively better.
Try to visit a range and rent a P99. There's no substitute for personal experience.