Great spot!
I stayed here for 2 months. The place itself was very clean, and just as advertised. Well-furnished and comfortable. Kitchen is well equipped and spacious. Heating system works well, as does the WIFI (mostly). The WIFI can be a bit spotty at times, but usually doesn't get too bad.
The apartment is very close to Brussels South, which is very useful (around a 6 minute walk), which allows you to essentially go anywhere in Brussels very easily, with connections for trains, trams, metros, and buses within walking distance.
Femi is a great host, easily reachable and always prepared to help.
Definitely would stay here again.