I have not had them do it, and I would ask them the same questions you would ask any vet prior to a neuter. How often they do rabbits, what their success rate is, whether they send home pain meds, if they fast the bunny before the procedure, what anesthesia do they use, how many incisions do they make etc. Answers should be, in order: often, 90%+, yes of course, no, the anesthesia depends a bit, for a neuter: 2 incisions.
Edit: Also, what kind of sutures they use. Inside should be dissolving stitches, outside should be wound glue.