Probably is the same as any other massage in BKK. The two Health Lands massage is the best for me apart from the Wat Po temple.
but again it depends on what you are looking for. You can take the Airport Link to Paya Thai and then take the Sukhumvit line to Asoke and take a motorcycle taxi to Health Land. Takes about 5 mins on the motorcycle and can walk in about 12 mins from Asoke to Health Land. If my memory serves me right it's 500 baht for a two hour Thai massage.