Hi,
You may want to wear a suit INTO the spa room (and then remove it for the lotions/mud). I thought the robes are sort of skimpy (and I'm a size 6). I'd have felt a bit self-conscious wearing nothing under my robe during the walk down the hall from the locker room to the Rasul room.
When we checked in at the spa desk, the attendant gave us 2 keys - one for DH's locker in the men's room, and one for my locker in the women's room. Then, after we were changed (into swimsuits and robes), an attendant came to get each of us and walked us down the hall to the Rasul spa room.
It was very steamy - we also tended to leave the steam room propped open to the shower room, or else we couldn't see anything (like even each other!

)
The door locks, so no one can 'walk in' on you. The knock on the door we got was LOUD. we both jumped!

It is booked an hour, but by the time you change before and after, we weren't done for over an hour and a half. I think you get an hour 'in the room' maybe? We didn't have a watch, so I don't know exactly. Afterwards, we didn't receive any gifts, but neither did we get a sales pitch to buy anything.
For the rest of my trip report and pictures, see my link below!
(don't worry, no Rasul's pictures!)
Have fun!
Lauri