Nice review!

I must check out this place.
I had the hot/cold water oral at an Everwell in Chinatown maybe 7 years ago. More internet research on this technique pointed me to what's called the "full dragon service". The service involves getting a full body massage with the mouth and tongue. The mouth being alternatively full of hot or cold water.
Two years ago, I finally found a full dragon practitioner in Kuala Lumpur, at the Bond Spa. According to ISG, the service is popular in China, but I've never been there.