I bought a SAI "Loaded Standard" M1A MA9222 almost a year ago.
I have never had a single problem with the rifle. I fell in love with her almost immediately.
I have not had a single jam, failure to fire, failure to extract, or anything. And I do not own a single USGI magazine. I use primarily the Taiwan 57 magazines, along with some el cheapo 20 round parked mags of unknown origin.
Accuracy is plenty good. Much better than me. Never shot her off a bench, but I can get 2-ish moa 200 yard groups from the sitting position.
The only problems I have with it are lack of chrome lined barrel and how fat the barrel is. I think my next rifle will have the standard GI contour, so I can mount a foward optic easier (read: scout mount).
Something along the lines of this:
Hope this helps.
(ETA:)
I've fired nearly a thousand rounds through said M1A. Just so you know I haven't fired just a box or two. I love it. The trigger is wonderful, also.