This place is great for a work-related stay. For me it was perfect as it is very close to VUB and 20 min away from the Brussels city (by bus).
The place was overall clean but some things (clearly not in use) were quite dusty. But all things you use on daily bases were clean and easy to use.
There is a massive kitchen with all necessities so that was a big plus. Also the hosts were quick to response and even if their english is not the best, we managed to communicate well.
The only really negative thing are very thin walls. I could hear people cough and walk up the stairs. So bring some earplugs ;)
Overall I would recommend the place.