We stayed in Brussels for 4 days in February and really enjoyed our stay.
The heater of the apartment was enough for us and we weren't cold at all.
The apartment is 5 minutes walking from Brussels Zuid which is the nearest train station, where you can take trains to anywhere, Bruges, Gent, Antwerp, etc.
The apartment is near the center in case you want to walk to the center instead of taking the train is like 20-25 minute walking from the Manneken Pis.
There is no noise and from the penthouse you can see everything even the Atomium and at night which is the best part!!
The apartment has no TV so you might want to take your laptop since the internet works so fast and they have cable for you to work with it faster.
The hair dryer was stolen by the previous guests and Thibaut was very helpful trying to figure out where it was and he apologized a lot for this inconvenient.
In general our stay was nice, we really liked the apartment
Como españolas que somos echamos en falta un microondas y una fregona ya que para fregar el suelo nos era bastante complicado tratar de fregar con lo que allí utilizan.