Stay the bleep away from ATR. They do not pay on time. You have to ALWAYS CALL and remind them to pay. And, they always do annoying "status checks" on orders they sent you. Example: I got an order at 4pm one day, and we agreed that I'd have it in EOB the next day. It's not even 11am that next day and they call asking if they're on track to get it that day.

They do not trust their abstractors. They constantly call and pester you. Then, to boot, they won't pay you unless you call and remind them.

Stay far, far, far away from ATR. In fact, do a forum search on them and you'll see exactly what I'm talking about.