We stayed in the apartment on the 18th floor with three little kids and loved everything. (You can not overvalue the feeling of coming HOME, utterly exhausted after long walks through a yet unknown city…)
Jean really has a knack for interior. The apt. is perfectly equipped and offering everything you need. It features two balconies overlooking the whole city. So even if you do not want to leave the house, you can see the Atomium, Grand Place, etc. from there ;)
The kids were elated by the urban farm just next to the building. Where they even had donkeys. Most of all Jean himself was incredibly helpful, uncomplicated and nice. I absolutely recommend him as a host!