Picture here:
I'm pretty sure NYPD was the only major user of the true DAO SIGs vs DAKs, and from what I've heard they were horrible.
If there are 12 of us in the world, it would track that a quarter live here. I'm a DAK fanboi--I think it's the people management trigger that a LEM should be. I actually shoot it better than DA/SA, and I think that it slows me down just enough that I don't outrun my headlights. It's not a .12 splits gun, but it's a great shoot-at-assessment-speed gun. I also think that it pairs well with the heavier caliber .40 and .357 guns, because the recoil recovery and trigger reset speeds tend to come out at the same time.
I am a flicker that almost comes off the trigger during reset, so the false reset, which is a dirty, dirty lie, doesn't even compute for me. A ride the reset shooter might struggle. I've never shot a Beretta 92D, but in my fevered imagination, that's what a P226 DAK is--a big, heavy, forgiving 18 shot revolver that automatically goes back into safe mode as soon as you're done shooting. (Side note: where does the 5946 fall in this realm? I've been tempted as of late...)
My bedside gun is a P226 9mm DAK w/Mec Gar 18 rounder and Surefire X300. If I were going to a pistol-only gunfight, I'd take a DAK. If a new/old stock SiGARMS-marked DAK has sold for inflated prices on GB, I was probably involved somehow...
Some gratuitous DAK porn--a couple of projects from my collection: an all-stainless P226 milled to accept DAK guts by Wright Armory, and a P229 .40 milled for direct Acro mount by Impact Machine: