Decided to try this while in Munnar. Went for the 90 minute one that costed around Rs It was satisfactory.
The therapist was good. Though it was a whole body massage, he mainly concentrated on my.
The hot fomentation with herbs wrapped in muslin cloth was relaxing, followed by the steam bath. The ambience was basic but relatively clean.
You have to be prepared to be almost naked with just a thin muslin cloth over your privates. You can opt to be in your own underwear if you wish.
I would advise you to experience it at least for once, especially as it is something Kerala is famous .