Pretty nice people as I recall. BBJ is a whole different world than flying shceduled. Did it for 3 and a half years. Be prepared... you are going to be the DO, CP, Director of Security, Director of Safety, Ground Handler, Flight Ops, all rolled up in one. Personally, I loved it and would love to do it again.
Very important... make sure you have major medical insurance that covers you internationally. Make sure you have enough cash in the bank to get yourself home if you don't like the job.