Love my P220 SAO. Been a good ten years since I've had any 1911 style pistol, but this single action is like second nature for me. The thumb safety may be a bit higher on the SIG, but it's operational for me. Very positive engagement, and best part is, you can rack the slide and chamber a round with the thumb safety engaged! The supposed 5lb trigger on this pistol is very smooth IMO, and rivals my Glocks factory trigger pulls from reset. I just can't say enough about the SIG P220 SAO. It's truly amazing I was able to come across this pistol in trade for my former G30 while actually looking for another 1911. I consider myself a lucky man.