In my opinion, as long as you make sure to choose a high-end hospital in India, they are superior to USA hospitals. Nice doctors and more aftercare.
So I've seen King Edward Memorial Hospital listed several places as a place to get treatment in Mumbai, India. But, I wish I could update those lists to say use caution at this place. I've heard from surgeons and family in India that this is primarily a gov't hospital for low-income people, and they tell me India is not known for cleanliness or hygiene at low income facilities (sad, I know).
I almost chose Kokilaben Ambani hospital in Mumbai. A high end hospital. I spoke personally with the surgeon Dr. Vimal Someshwar. Very nice guy. He said they're trying to push approval through to start doing the procedure for MS patients. He felt it'd get approval in 5-7 weeks (from today).
If you want to go to Mumbai, I'd jump on this one. They don't keep a waitlist until they have approval, so if you stay on them in 5-7wks, you might be first on their list!
The total cost is 6,500 to 8,500. Plus flight, which is considerable.
My two big negatives were that I couldn't handle the long flight from the states, or the killer heat. Not that the hospital wouldn't have a/c.