I have two, both in 223. They shoot unbelievably well, and I like the camo pattern. If I had it to do over again, I'd build one myself, and either paint it (Duracoat) myself too, or have it dipped. Be careful when buying an AR! It will become a habit that borders on addiction! Pretty soon, you will have uppers in several calibers, then you will be putting lowers together, and finally, you will be able to put an entire gun together in about an hour and a half.
I can't say anything bad about my R-15's, except I did change/modify the triggers.