The room had a permanent strong stench of smoke. I guess someone had been smoking for long time in there. This was very disturbing.
The walls of the studio are so thin that I was awaken twice in the morning by the clock alarms of the neighbours. So bring along your earplugs. You can hear them talking, they can hear you. Be warned.
The apartment is basically part of a rent-a-room service, so do not expect any personal treatment, nor welcome. I had to wait almost 30 minutes to get inside, since the attendant could not take my calls. I was late for a meeting for that reason. Apart of that, the apartment is nice and located in the best possible place in Brussels as for nightlife and sighseeing.