This place is the perfect place for staying in Brussels, and also the host is exactly how the perfect airbnb host should be. The place is even better than in the pictures, is very very clean in every moment, the room it's exactly what you need if you are only staying a few days. The bed is very comfortable, the view from the balcony in the living room is nice and everything looks very organized.
The apartment it's a luxury one, so it honors the name "The little castle", you will feel very comfortable while staying there. Getting there is very easy and also you can take the tram, bus and bike at the front of the apartment building, so you can get to the centre like in 20 minutes once you learn how to use the public transport.
Nizar it's the best airbnb host that i have ever meet, he's very friendly and nice and it feels like if he was your friend from a several years. You feel that he's an airbnb host because he likes it, not only because the money, so that it's a very important and nice aspect. Also he explains everything that you ask, gives very useful tips, like how to use the public transport or even where to eat.
So in conclusion, definitely you should book there.