The Spa at Mandalay Bay was the best. It wasn't much more expensive then other spas I've been to and if you consider that enjoying a day at the spa will save you from losing your money at the slots, well then, it's not expensive at all.
When we reserved a room we received a great package deal. Access to the spa free for the day plus two services. The massage wasn't the best I've had but my time enjoying the steam room, jacuzzi, etc. was well worth it. The jacuzzi was two rectangular pools separated by plants, at one end there was a cold plunge and the other was a warm pool when you needed less heat. The steam room was large and had several levels where you could sit higher if you wanted more steam. I would come back to this hotel again just because of the spa.
Pros: Great Rooms, Fantastic Spa, Good service
Cons: Expensive, Restaurants So-so
more