Nice, well-equipped apartment and a responsive host. Apartment is in a great location and plenty spacious. There's a code lock on the door (in fact there's a code lock on every door in the apartment) so check-in was easy and flexible. We stayed here with 10 people who were arriving at different times, and the fact that we didn't need physical keys made things a lot easier.
It's very clearly a commercial apartment considering the code locks on every door (and considering the 2 buildings on either side have the same code lock, and wifi with the same password pattern). I very much doubt anyone has ever lived there. But this made it all the easier for us as a group. Every one of the 6 bedrooms had 2 beds in it that could be pushed together to form one bed. If you're looking for a place to stay in Brussels with a big group, this is a great place.