Yann's apartment is really cosy and comfortable. It is at a very central spot, at a walk distance from the touristic attractions and EU and other organisations' premises. It is also near the metro station and you can also find many places to eat and shop in the neighbourhood. The apartment is specious enough for 2 persons, it has a really big bed with even a reclining mattress. The kitchen is also very functional and you can use its very high wall-attached table as a desk and work with your laptop.
Yann has been very kind and helpful. I will book again his apartment when I am in Brussels.