We were four people and the flat had everything we needed for our weekend-trip to Brussels: a kitchen, a balcony and lots of space!
The neighborhood is full of fancy fashion, beautiful buildings and everything you need in walking distance.
Minor disadvantages were the fact that we had to make up the sleeping couch ourselves, small stains on one of the bed sheets and the facility service that arrived one hour before check-out (I guess there was some kind of misunderstanding there)
All in all, I would still recommend this flat because of the good price and the generous size of the rooms.