The Belle Vue room itself is very nice - reminds me of Sherlock Holmes' study. However, I found the prices to be a bit steep.
Do check when you arrive to see if they are still offering food items. When we were last there, they were not.
We actually prefer to have a drink there in the late afternoon and eat breakfast in our room. The Boardwalk Bakery has lots of delicious pastries to choose from if you'd rather catch something on your way out or just want a treat to bring back to your room.
Enjoy your trip!