I've got one. (that was my post about the issues). In spite of the issues, I like it. I would probably like one of the high end builds better, but only had so much to spend and i've got nothing to compare it to.
The warranty probably would have taken care of my issues, but i'm a hands-on kind of guy and impatient. I like to fix things and wanted to tackle this myself. If you've read the thread about the headspace issues, I've got them ironed out. I just pressed out the barrel and re-installed it the other day. Now i've got a nice gap of .016 with all the RCM parts and standard rollers (used to be .035 w/-6 rollers using the rcm parts). Dumped a mag last night as fast as i could without a single failure. Today I'm going to blast, park and repaint everything.
As it stands, I've got 1100 + a new bcg $500 = 1,600 into the gun and it seems to be working perfectly. Now, I could have added a three lug barrel, but i like the look of the flush front and it would have cost another $175 or so. Unfluted chamber is actually a plus for me since i reload and have been told that it is better on brass... who knows.
If I had $2500 to spend i definitely would have gone the professional build route, but I didn't.