Rookie, I'm kind of in the same boat, and here is what I've heard from various people here & elsewhere.
1. Any given player is usually allowed to beat them out of $10-15K before being shown the door.
2. It doesn't seem to matter if you are hitting them for the limit, or less. The $10-15K figure sure seems to be the trigger.
3. Their CS sucks. Always has and probably always will.
4. They will(and do) take up to a month to pay you. Most people seem to get paid at about the 14 day mark, but others have waited up to a month.
5. They pad their favorites to an extent that makes them a VERY tempting book.
6. With one or two very complicated exceptions, I don't know of them ever giving anyone a full blow stiff.
I was going to post up with them a couple weeks ago, but then heard rumors of them looking for investors or a buyer. I'm not sure if there is any truth to that, but it was enough to get me to back off for a while.