I frequently shoot my P99AS in action matches (IDPA style) and always holster in DA mode. The transition DA/SA is flawless and under the pressure of the match you can hardly tell the difference. Still, the DA trigger makes me feel more secure carrying a gun without a safety. Plus the decocker is just excellent. That's a thing the QA has over Glocks too. You can decock it without dropping the striker. At the match we are required to unload, show empty and decock before re-holstering. A few weeks ago someone did an AD with a 1911 when dropping the hammer. It hasn't happened with a glock yet but it could. Won't -ever- happen with a P99 even if you are stupid enough not to check the chamber.