You forgot to mention one neat feature: the slide can be cycled with the safety engaged, making it safer to clear the weapon.
I'm really disappointed the SAO P220's didn't take off.
Good point on the safety. I knew the safety was set up for that but didn't even test it! After shooting the gun, I'm also a bit surprised they didn't take off more. I guess not enough 1911 shooters wanted to try them and the hard core Sig shooters can't fathom a single action in a working gun.