Amazing! Without question, the best hotel spa - scratch that, spa - I've ever visited!
I had a vineyard facial (a summer special) and it was WONDERFUL! The facilities here are amazing - rooftop pool, fitness center, relaxation room, sauna - the list goes on!
The only negatives - I also had a pedicure and manicure, both of which were disappointing and extremely, extremely overpriced for what I got - the manicure/pedicure I get from the mall are just as good and half the price.
Stick with the facials, massages, etc. and you'll love Joya!