I would definitely recommend this place. I had a great weekend in Brussels, tho I think the place is also great for a longer stay. the apartment is a bit outside of the city center but with public transport it's well connected and everything is easy to reach. The place has everything one would need and it's very quite. Olivier is a very welcoming host and the communication worked great.
Supermarkts and a big park are close and I'd definitely recommend the pattiserie down the street!