I know this sounds crazy, but can you ask to speak with someone who is no longer with their program, as well as a successful trader who left.
my feeling is there is a ton of pressure and micro-managing going on....constant talk in your head to really do what they think. If you dont', well you can't win. if you lose, you are the worst, and if your own ideas are good they are never good enough.
however, if you can talk with someone who left...that would seem invaluable.
i could never give money to someone in this capacity. i've heard in the fine print they (bad firms) keep your capital for a long time after you leave.