I've had a couple of RIA 1911s. Both were GI models. I also briefly owned a tactical through a deal with a friend (I bought it for cheap because he was in a bind and needed money, with a garuantee that he could buy it back for the same price). Friend bought it back a short time later, but I did put a few hundred rounds through it. I have had good experiences with RIA, but my newest GI was purchased recently and it has pros and cons over my old GI. The finish on the newer model is much better, and I like the fact that they didn't put their logo on the whole slide (my old one didn't have a painted logo like the newer ones though). The trigger on my new one, however, left a lot to be desired. It was the worst trigger pull on all of my pistols until I put a 19# mainspring and C&S reduced pull sear spring in. Its much better now, but still is a little on the heavy side (I'm guessing about 6 pounds... It was all of 9 before. Seriously I thought it would never break). Reset and take-up were greatly improved. I don't know if my new one is just a bad example, trigger-wise, but it was horrible. The good news is it was easy to improve with about 15 dollars worth of parts, and everything else has been perfect. Trigger on my old RIA was as good as any I've ever felt.
In summary, a RIA is not junk. Its a good value. It never could be as sweet as a SA range officer, but its not meant to be. I would, and will, trust mine in a defensive role. I got it just for that, as a matter of fact, because I dont want to mess up my nicer Springfield by carrying it. A $400 RIA can take a scratch or two without me freaking out over it.