I have stayed at the Bali Mandira Hotel a couple of times now and really have a relaxing time. The adults only pool is a great idea for people either traveling solo or just don't want to have children around while relaxing by the pool. While there this time I went to the spa and it was great. I had a relaxing massage on the morning of departure.
Also I found out I was able to use the gym in the Padma Hotel just across the road - that worked really well and it is a great gym.