I stayed in Pierre's flat for six days while I was in Brussels for work. It's very well designed, furnished and equipped so you will have everything that you need. The street is very quiet, as is the bedroom which faces onto the back garden. You may hear the upstairs neighbour from time to time, but not at hours that would disturb you (if you're a light sleeper, a pair of earplugs will definitely block out all sound). Pierre and his wife were very friendly and helpful and were always quick to respond. The location is very convenient for getting around to areas like Flagey, Saint-Boniface, Louise, Toison d'Or, into the centre if you're in town for touristic reasons, or to Schuman if you're there for work. I went everywhere on foot or by Villo bike share. Definitely recommended!