I haven't had this surgery so I can't really comment about that part, but I'm more curious about your situation. I'd always assumed that any loss of sensation after a vaginal delivery was a nerve thing, not a looseness thing. That would mean that surgery wouldn't help, in fact, I'd be worried that going in and cutting around in there could even make it worse.
Were you able to have vaginal orgasms before? Does your clitoris still work the same? Do you orgasm at all now or is that completely over? Sorry for the curiosity, I'm just trying to understand what kind disfunction you're talking about.
Anyway, my advice would be to get a 2nd opinion. Remember, the opinion you already got was from someone who wants your business so it's in his best interest to get you to do it (I'm always a sceptic when it comes to doctors who recommend the surgery also being the ones who perform it and get the $$$
). I would also keep waiting to hear from 'satisfied customers', definitely.