I have to say that my first experience with ATRS (well, other than buying some primers once prior) has been exceptional.
Dealing with Peter in the shop has been an awesome experience, building a very unique .300 Fireball (you might know it as its proprietary name, .300 Whisper) upper for my AR15. I'm just blown away by the service, including testing the upper to make sure it will function under the conditions I had specified.
I'll definitely be back, and I have to say that Rick and Peter (and the other guys at ATRS I haven't dealt with personally yet) looked good to me before I asked about this build... but now, having actually invested time and money - well, once I pay for it, that is

- with the ATRS shop they all look even BETTER.
And, meeting Peter and Rick at the Calgary show didn't hurt either - what a couple of solid, interesting guys... who REALLY know their stuff.
And they let me fondle both Rick's personal AR15 and a BEAUTY .338 Edge... oh man, it was straight gun ####. Enough so that the guy I brought with me is now frothing at the mouth to revive his old FAC into a new PAL and is just in love with ATRS after visiting their display with me.
-M