My SAO SIG is a P220 Super Match and it is a terrific pistol in accuracy and reliability, so far it's been 100% for just over 1700 rounds right out of the box and the most accurate centerfire pistol I've ever shot.
SIG's iteration of the thumb safety is excellent as well, I like the fact that you can manipulate the slide with the gun on "safe" because the safety doesn't lock the slide so you can eject a live round with the safety on.
It also has a very nice, positive, "click" when you flick it off.....the safty's detent is very secure.
The trigger isnt as good as a 1911; but it's very good.
My daily carry is a DA/SA P220 Carry Equinox, the DA first pull doesn't bother me, I shoot it often and have become accustomed to it and I like it a lot; but I like the SIG SAO even more.
If I were to buy a new carry gun, it would be a SIG Carry SAO, which has the same slide and 3.9" barrel as the compact model but on a full size grip frame.