Here are two things I hope no one has mentioned yet and if they have, sorry I guess I should have used the search:
1. The tailcap's threads aren't anodized like fenix so there's no possiblity of tailcap lockout by unscrewing just a bit. That being the case, I'm glad the button is hard to mash.
2. Has anyone else noticed that there are two nice, longish holes in the tailcap that are just BEGGING for trits? Between the low low, the body-colored clip, strobe (which I love), and now the possibility of trits I think I've found the replacement for my Nitecore D10's!
Tailstanding is imperative to me since it's the easiest way to light a room during a power outage (here in hurricane country). That's why I got the QAA. The tint is so nice, though. I have two D10's that I got from 4sevens. The first one made a whine so loud I couldn't stand it. Returned it. The second one had a pretty ugly greenish tint but I kept it because there was no whine and I really like the Piston Drive and UI. My second D10 (GDP) was a blueish tint but (thankfully) didn't whine at me. Being a musician, I guess it bothers me more than most. That being said, the tint on my QAA is so nice! It's neutral, not warm by any stretch, but it's not green OR blue at all! I was so relieved since 4sevens sent me an LD10 I had ordered for my mom and it was bluer than my Nitecore D10 GDP! I couldn't believe it.
I will miss being able to access the low modes with one hand, but that's the only drawback I can see.