I have a PCR-5
I have put about 600 rounds thus far.
The fit and finish are fair-good. I have a rock river rifle, and the finish is better on the Rock River. The fit between upper and lower on the Oly is a little loose, but not too sloppy.
I had a serious problem right after I bought it. It would not extract cartridges after firing. I bought a new extracter, spring, and spring buffer, and all my problems went away.
It still does have a slightly tight chamber, however, because when I shoot mil-surp S.A. ammo, I get one out of every 100 or so that will stick in the chamber, and the rim gets torn off by the extractor. This does not happen with .223 domestic ammo.
Overall, I am happy, but I will probably trade this off when I get a Bushmaster, due to the fact I want a looser chamber and chrome lining in my small, lightweight AR.
I would buy Oly again, but only for a match rifle. Their barrels are very good.
For a plinker, I disagree about buying cheap. You can pay $599 for a Oly el-cheapo Plinker, but a bushy is only $750. I say, save a little more and get a better quality rifle... personally. 150 bucks is not worth a days problems, IMHO.