There's a Paul Mitchell school in Roswell on Holcomb Bridge Rd, just west of 400. It's called the Esani Institute. Just be VERY specific about what you want and keep reminding them if they seem like they're going off track.
I asked for "subtle highlights, so that when it grows out, there won't be an obvious line" and they way over-did it. I already had some previous color, and to avoid an unexpected reaction, it's was easier for them to just remove ALL the color and start from scratch. But the color was NOT subtle - in fact one of my co-workers that I see every day didn't recognize me from behind.
Still, I'll go back. I just won't be as shy about questioning them.