It is a located along the street of what I call the old bus-station (Thanon Anatana Woraritthi Det) in a double 1 store shop-house. It is clean and the staff is friendly, but nobody speaks English.
They do traditional Thai massage, oil massage and foot massage. They have 6 or 8 places for full massage and 3 chairs for foot massage. I enjoyed it very much and felt very sabaai afterwards. Highly recommended!