We definitely recommend this place.
We went to Brussels for a weekend together with my girlfriend.
The apartment is really comfortable and clean. They are SUPER nice and we are really happy with their hospitality. They even recommend us a few places and they pointed out everything in map that they made by themselves. So, you can easily noticed that they care about their guests.
And, another think to keep in mind is that the location of the apartment allows you to visit the city quite easy.