We had a fantastic time staying at Luc's place!
The flat has an elegant artistic feel, it is very comfortable and clean and it would be a perfect place even for a longer stay. The location is also perfect - very close to the centre, but not as touristy as the very centre and with a lot of nice cafes nearby.
Next time I'm coming to Brussels, I will definitely see if Luc's place is available so that I can stay here again!