I asked my surgeon about it after mine were placed. Her response was to say that she'd never yet had a patient come back and say, "Oh, that was bad." I think it's a matter of feeling comfortable with it.
--39 year old female, dx as UC in '04 (1st symptoms in '03), switched to Crohn's in '05
--1 fistula, crohn's colitis, limited to large intestine
--rejected (reaction/didn't work): Asacol, AZA, 6-MP, MTX, Remicade, Humira, prednisone
--stuck on methylprednisolone
--tried Prochymal in Phase III study (can't wait til it's approved!)
--waiting to start Tysabri
--single mom to 10-year-old girl