Eduardo answers quickly to your messages and he even proposes to help you. (during my stay, the weather was a bit warm and he wrote me right away to check on my comfort).
The flat is small but it has everything you'd need for some days of visiting Brussels. I was by myself, but I guess it should be a good option for couples as well.
The flat is very close to the city center (in a bit weird zone but I didnt have any problems coming late at night). I went everywhere by walking from the flat.
I sure recommend this place! and if coming back to Brussels, I might stay here again.