This place is great value. With friendly and helpful hosts. We walked from here to the city centre, 40 minutes, and a different day walked to the Atomium ~50 minutes.
It has an unusual bathroom setup that's good to make sure you're comfortable with before booking. A very good shower and sink in the bedroom, and a toilet just outside the main apartment at the top of the stairs (in it's own room of course).
We stayed with our 10 month old and Saskia let us leave the pram at the door rather than take it upstairs. If you're going to Brussels, I highly recommend you try the Ethiopian restaurant in the centre.