Taking the DW to Vegas tomorrow for her birthday. Buying her a full spa day as part of her present. She knows a ton about this stuff as she's a massage therapist and esthetician. I, on the other hand, know absolutely nothing. I've never gone to a spa, so I'm wondering if any of you had advice as to the three spas available at Mandalay Bay. There's Spa Mandalay, the Delano Bathhouse, and the Four Seasons spa. Which is the best? What services are your favorites? Anything really special that's available there that wouldn't be easy to find in Wisconsin? Any packages you have enjoyed?