Just to add an update. My SIG 1911 had about 500 rounds thru it and one instance of a failure of the slide locking back. But other than that no further issues. And in regards to that failure, I justice sure the slide catch is well lubed and I have had no repeats of that failure.
It's just a solid platform and SIG does it quite a good amount of justice. IMO SIGs are well worth the $$ they command.
SIG 1911 .45 ACP
SIG P229R 9mm
Beretta BU9 Nano 9mm
Beretta 84FS .380 ACP
Ruger MKIII 22/45 Target .22LR
PWS (Primary Weapons Systems) MK114 5.56