I went to the Tucson Canyon Ranch a few years ago, so I'm not really a regular. I loved it, but it's pricey. If you want access to cutting edge medical, fitness, and spa experts, it's worth it. You will be dealing with doctors, nurses, trainers, massage therapists, estheticians who are tops. We heard doctors talking about health issues that 6-9 months later were talked about in the mainstream media so they are using the latest and best info available.
I was so jealous of the people there who go every year or several times a year, but everyone is treated like a valued guest.