I have stayed here twice now. The second time I had no choice as we were literally stranded in Belfast for the night.
The first night there was four of us (all girls). We were heading out for the night and were having a few drinks in one of our rooms beforehand. We were just chatting, in my opinion not very loudly at approximately 9pm when one of the owners came to our door to tell us off for making too much noise. This obviously annoyed us a bit as it wasn't that late and we weren't making much noise. However; we kept our voices down and we were gone by 10.30pm.
The second night I stayed, I was woken up at 6am by the people in the room above us. It sounded like elephants were stomping around the room and as if they were dropping things all over the floor. As if this wasn't bad enough it continued for over 2hours! So clearly they were inconsiderate guests but the walls and floors must have been paper thin too.