I got an RIA 1911 Tactical recently. I'm in the process of accurizing and customizing it. It shot to the left quite a bit when I first got it, but this seems to have been mostly due to its flat mainspring housing allowing the gun to twist in the hand when recoiling. I replaced it with a Wilson Combat V-Grip housing, and that fixed it (as well as eliminating the only plastic part in the entire gun). I'm planning to have a Wilson match-grade bushing installed on it, as well. The gun is very well-made with great tolerances on the slide and frame, and a good finish. All in all a very nice gun.
Upsides: quality construction, accurate, well-finished, built to true 1911 specs. A bargain for what you pay.
Downsides: plastic 1911A1 mainspring housing (very easily replaced), overly large Rock Island Armory logo on the slide. Overuse of black parts on the Tactical models with silver and black parts (it's a little TOO black for an ideal mixture). Possible downside: very tightly installed barrel link pin. Not a big deal for most people, but if you do need to get it out, be prepared to hammer at it with a punch.