We had a really great time in Brussels and at Julien's apartment.
Pros:
1. Very helpful and responsive host
2. Located at great location
3. Great bathroom
4. Lots of storage areas.
5. Cool small kitchen
6. No traffic noise
Cons:
1. If you like modern apartments/furnitures, this apartment is not for you.
2. The house is bit old, so the woods give out a distinct odour, also is not a problem if one is used to it.
3. The terrace is not cleaned like inside the apartment.
4. Kitchen needs to be bit more equipped.
Overall for short term stay I can recommend this apartment.