I love the Mandara Spa at the Dolphin. While the services were very good at the Floridian the atmosphere was average to poor. Small crowded dressing rooms, small crowded holding room (so crowded there was not even a place to sit!) You are paying close to top dollar at the GF Spa and I just do not think the surroundings are worth it.
The Mandara is posh luxury! The spa's decor is magnificent-high ceilings, carved moldings, and large sofas to rest before your service. The locker room was equipt with everything from toothbrushes to razors, and the steam room was large. While my massage was perfect my facial was okay (no steam and extractions were extra). I simply told them the facial was not what I was use to and they did not charge me for it!
Also, the Mandara will give you $20 off if you ask for a coupon.
Enjoy!