CAT,
I cant speak from experience about the accom at Stapleford, however I did do one of my PPL exams in one of the rooms as they were having building work done in the classrooms! The room looked ok, pretty small, had tv, can't remember if it had a sink - dont think so, and communal kitchen I believe. Give them a call and they'll tell you. It all looks in good nick though.
By the way, which part of sunny Belfast are you from? I have family living all over Co. Down and South Belfast.
Cheers
Foz