I would respectfully disagree with the "disgraceful" sentiment a bit. I've been a heavy user of SIG Classic pistols since the late 80's and, while I agree with JayFramer that the WG P226's were of the highest quality, they were not perfect.
The welded in a breech block could let loose on occasion and the old style long hammer strut and spring made the DA pull atrocious. Having said that, the overall quality was indeed outstanding.
However, I've had several US made P226's and while they don't have the same cache as their WG forerunners, there are darned reliable. Has SIG overreached at times and stamped guns out too fast? Yes. Have stupid errors shown up on their pistols that should never have left the factory, such a horribly thin finishes (Legion), wobbly and non-securable rear adjustable sights (Elite Dark), weak trigger springs, breaking trigger bars or ill-fitted barrels that group like grapeshot? Yes. Has their Customer Service at time rivaled H&K for the "Go Pound Sand" model of apathy? Yes.
However, it is also true the vast majority of newer P226's function extremely well. They are made differently now of course, more simply and more cost effectively. To make a P226 today like they did in 1988 would probably result in a $2000 price tag, and few folks are going to pay that these days for a DA/SA duty gun, no matter how high the quality is.
I have a P226 Emperor Scorpion Elite in 9mm that is simply fantastic and runs rings around my '89 WG gun for usability. The overall DA pull is light years better, the SRT is as sweet as Christmas candy and it is actually just a bit more accurate. Same for my P226 Elite Dark in .357 Sig. There are many others that I can name that are balls reliable and laser accurate, like my M11/A1 and a Texas DPS retired P226 DAK. They've been run ragged and have never been found wanting.
Yeah, you stand a higher percentage chance of getting one that needs fixing with the newer guns, but the percentage is still small compared to the overall number made. And I think SIG's Customer Service has gotten a heck of lot better in the last few years...they had to, they were taking a merciless (and at times justifiable) beating over on the SIG Forum.
I would not feel uncomfortable at all using any P226, P229, P227 or P220 made by SIG today for duty use or personal defense. Sure, I'd examine it super carefully out of the box for flaws, then run it hard at the range for about a 1000 rounds before I bet my life on it. But then, I'd do that with *any* handgun that was going to fill that role.
You pays yer money and takes yer choice.....