Gregory always replied immediately. He gave us detailed information, even about how exactly to get to his appartment also including information on the prices of metro/tram tickets and. :-)
He had even prepared some tipps on "what to do around this area" and told us not to hesitate if we had any further questions.
The area in which the appartment is located is very nice; a metro station is directly next to the appartment; there are nice cafés and bars that can be reached by foot within a few minutes. Also it is not far to the city centre of Brussels.