Hello Joe_Pike, I consider myself to be a 1911 guy. That being said, I've owned several P220 variations over the last ~25 years and was a LE armorer for SIG and other manufactuer's firearms. One thing my P220s all had in common, was flawless reliability with any appropriate ammunition. Nothing ever broke, and accuracy was as least as good as, or better than, any other service style pistol I owned. Having used both P220s, and various manufactuer's 1911 type pistols, right out of the box I would trust the P220 more than a 1911 type to function as it should. Not something I heard on the internet, personal experience. BTW, the P220s were not designed to function with SWC bullets. I don't consider this to be a negative. Still have one P220, an older German manufactur 9MM. Goes bang every time, and doesn't suffer any deficiency in accuracy.
Some of the stainless slide/internal extractor guns were reported to have extraction problems. One of my coworkers started carrying a P220 after his Glock Ka-Boomed during training one night. It was one of those guns with an extraction issue. None of my SIGs, or those of my other coworkers, suffered extraction issues. But this one did. To my knowledge, Sig never admitted a problem, but current P220s utilize a different, external, extractor. I prefer the older generation of German guns, but consider the P220s whether German or American manufacture, to be very good pistols.