There are a lot of people who have built more than me, but I have built a few, always on the cheap. I have no problems with the PSA rifle kit I put together. It seems fine, and I've had no problems at all with it.

My wife wanted a lightweight AR and I finished putting one together for her last weekend. I like it a lot more than mine and will buy some of the same parts for mine that I put on hers. The most surprising thing about her build for me was the lightweight barrel from Bear Creek Arsenal. I got it for $80 from ar15discounts.com. Fit and finish looked great and I was holding 2" groups @100 yards just propped up over the golf cart. And that's with a 3 moa red dot with no magnification. The company was great to deal with too. I had ordered the wrong size gas block and they called me to make sure that's what I wanted instead of just shipping me the wrong stuff like most places would have. Might want to check them out also.