After 5 days in Fez, I decided to try this experience. And I'm delighted, this hammam will be my best memory of this trip. Don't hesitate for a second!
Mohammed is very nice and makes you feel comfortable easily. He will explain how the hammam works, the rituals, the operation, etc.
A person will then exfoliate and massage you. At this time, the hammam is quiet. No tourists, only locals.
I recommend it 200%!