i've been there twice now, and I highly recommend it! One of, if not THE, best places in London for a Thai massage. Therapists are very knowledgeable, and make sure that you are comfortable multiple times during the massage. Prices are more or less in line with what you pay in London for a Thai massage, but you can get good deals through Treatwell and in store.
Had a back/neck/shoulders massage - very good job, it was a strong massage and very painful but I was very tight and suffering from cervical pain and it helped a lot! Very nice place and relaxing atmosphere