I stayed in Samanvaya for 3 nights and had a wonderful experience! The bamboo hut was so comfortable and cozy. The staff was very helpful and offered great service not just at the hotel but also outside of it (i.e., arranging for pickup, suggesting tourist spots, etc.)
The spa/massage is the highlight of this place. I took the traditional chakra massage and was satisfied with it. This place makes you feel so close to nature and away from all commercialization and hustle of the cities. Ubud has become commercialized and crowded. Sidemen as a location was perfect - rice fields and mountains all in one.
The food is also great - fresh fruits in breakfast, in-room dining, dinners, etc. I tried some really good Balinese dishes.