I have gone to Bumrungrad in the past and found them on the expensive side but OK. Have had my annual physical there for the past four years. (Yes I know it can be done locally but I dont want to get this thread cluttered with ratings of San Paulo and Pecharat . . .and call me spoiled but I want an English-speaking doctor.
Bumrungrad has just lost my business because of their absolutely lousy internet department. It took me a week and TEN emails both through their own website and through my email server before I got a hurried apology by phone and finally an appointment. ( Which I will cancel in a day or two.)
TEN emails!!?? . . .what kind of business ignores a good paying customer for a week and pays no attention to its own website appointment setup?

Anyway, Bangkok Hospital answered me within an hour ( that's within ONE HOUR!!) and so did one other hospital in Bangkok ("Piyarat or something like that.") The fact that a doctor replied with a long email and actually proved very helpful impressed the hell out of me.
But I want to get the real scoop on Bangkok hospital and any personal experiences or web locations with customer comments would be welcome.