This was my surial experience:
We (DH and I) checked in- got changed in to robes and met outside the locker rooms with a spa attendant.
She she took us to a room actually two rooms one is steam with little nooks and showers and the other has I think a bench and a shower.
She gave us a little tray with salt scrub and and two different kinds of mud. On a little table there were massage oils, lotions, and shampoo.
She told us a little about the muds (one for face one for body)
Told us she would lock the door and come back in 50 minutes and knock then after an hour she would open the door.
Personally we loved it. From what I understand some people have a G rated experience and some NOT.
Some people don't care for it and say it is not romantic (what is more romantic than being locked in a room without clothing with your partner?) Also I know that there have been equipment problems No pun intended! (no hot water, steam not working etc...)
Anyway we really liked it- but we have small children and don't get that much time alone and when we do there is always a risk of someone calling "Mommy!"
At the end there was a little sales pitch - I could have done without that. And a little speech about health benefits of a salt scrub (like we were in there for our HEALTH)
DH is a physician and I am an RN and we just nodded and smiled even though we thought she was full of it!
Anyway I hope this helps
