I ordered 5 or 6 a few weeks back. Overall they are pretty nice, but the actual shirt quality was a little disappointing. They are printed on Delta Pro-weight 100% cotton shirts. I prefer lightweight shirts and I'll always pick a 50/50 poly blend over 100% cotton. That's just me though.
If you don't mind the shirts being kind of heavy, the print quality is overall pretty damn good, especially considering you can pick your own colors and that it's $6 (plus shipping). As I recall, shipping is a flat rate for any size order, so the more you order, the better off you are.
I prefer lightweight shirts and I'll always pick a 50/50 poly blend over 100% cotton. That's just me though.
Like American Apparel, correct? Those are comfortable shirts.
Yeah, I think that's what a lot of the sites use. Most of my shirts have been coming from http://shirt.woot.com which has their own shirts. They are really nice though.
I would say, if you want some cheap shirts and don't really care if they're still wearable a year from now, $6 shirts is pretty awesome. If you are looking to buy something for the long haul, shop elsewhere.