My wife and I stayed at Sam and Axelle's place during the holidays. As you can see from the pictures, the place has some interesting unique touches which, being a Tintin fan, I very much appreciated. The stairs leading up to the flat are a bit of a steep climb if you have heavy bags. There was tea, waffles, and a really nice vibe to the place, which is in a really interesting and exciting area of Brussels.
The only thing that made our stay less-than-perfect is the absence of proper sound isolation between the mezzanine, where the bed is, and the apartment above. My wife and I could hear everything happening above us even when the people weren't being noisy.
All in all I would definitely recommend Sam and Axelle's place and really hope they do something about the sound issue.
Ahmed and Dorothee