As far as most spas go, Canyon Ranch is near the top. In general, EXCELLENT therapy, and beautiful atmosphere. You can comfortably spend all your free time (before or after) in the ladies only aquavana area, which has:
nice sized steam room (needs eucalyptus though)
Jacuzzi surrounded by *bonus* heated loungers
rainforest showers that have built in bird sounds
huge dry sauna
artic "dip' room which I was too cowardly to try
and on and on.
The co-ed area has great features as well. Lovely lounge, water therapy room with zero-gravity recliners (i'm buying one), and salt grotto which seemed cool in principle, but did nothing for me. Well-stocked with grooming amenities, but light on fruit and snacks. Just a bunch of tea and water. boo.
Three other major boo's:
"massaging" flip-flops are torture devices from hell. My dilemma: brave the spa and its cooties barefoot, or walk around bleeding to death on these things. Not a happy choice.
Half marathon from lounges to therapy rooms. in the bed-of-nails flip-flops.
Product sales pitch (complete with a guided tour of the spa shop) after EVERY treatment. Fine if you are there for one massage. I did a full day. Four trips to the shop was doing to my head what those damn flip flops were doing to my feet.
Recommendations: the deep cleansing facial. Best I've ever had. Ever.