We had a very good time at Belinda's. For us as coffee drinkers it was a special treat to get freshly brewed(!) bean coffee in the morning.
As for the room, it is an advantage if you are not too big. Even under 180cm you can get some bumps - especially at night after an extended tour through various Dublin pubs... if you survived the stairs upstairs at all :-)
For taller or corpulent people I would not recommend this room.