I have never used that service.
I know they get you reservations at the adult only restaurant, but you can do that yourself.
They also can get you spa reservations which you can also do yourself.
Basically they are there to wait on you. I think each day they leave you some kind of surprize like chocolate covered strawberries, fruit basket, cheese tray etc...
Myself I would rather take that extra money for a great excursion or extra souvenirs. I am never in the room long enough to worry about what room I have. We are only in there to sleep and clean up.