I stayed at the Halekulani. It was an impeccable hotel but for a full day at the spa it would have cost a fortune. So I went to the Serenity spa in the Outrigger next door which cost me half the price of what I would have paid. It was well worth it. I got a sugar/salt scrub, stone massage, facial, pedicure, polish change, and spa lunch. With gratuities. I paid about $450. The staff was very friendly, the services wonderful and I left there feeling AMAZING. They are on top where their clients are and what they are waiting for and you do not get lost in the spa.
Pros: Inexpensive, Great Staff, Clean
Cons: Small waiting room, Only one Shower room, No hot tub