QA
I've been carrying the QA for slightly more than a year, got it at Earl's. It is correct that I have not seen any QA models in any of the local store or gunshow so far.
With a round in the chamber, you can press the decocker to decock it; in a sense it's kind of safer than Glock when carrying in a holster. It is true that to rack the slide a little (the manual says 3/8"), it cocks the gun and ready to fire. But it does take practice to just rack a little, if you're stressful or in a tense situation and doing this, chances are you will rack the slide a bit too much and ends up 'move' the cartridge a little or the slide does not go back smoothly. If you do it right with practice, everything goes smooth and you can see the red pin protrudes at the end of the slide, and is ready to fire.
Of course one way to avoid this happening is to have an empty chamber, simply rack the slide completley and ready to go, the downside is losing a second or two.
I like the constant trigger pull of this model, which is the sole characteristic of QA apart from the regular P99s. Double tap is not that slow as one may suspect.