As a travel agent I have travelled to Bali many times but if you want a recommendation of the best place to have a massage and other spa treatments in Bali you cant go past the Santi Spa.
Although this time I was staying in South kuta each day I caught a Taxi to Santi for my 1.5hour massage with Agus ..Current cost for this treatment is 120,000 (approx $13) and you get all the extra bits. Lemon Tea, foot scrub and a true 1.5 hour massage.Agus is amazing...as are all the other staff at Santi. Make sure you book in advance...I have recommended many of my clients to try this Spa and none have been dissapointed. Give it a go you wont be sorry.