Not overly fancy, but definitely good for a short stay over. The room has some areas that will remind you of a construction site (a lot of ductwork on the walls, some leads visible) but you can tell that the host tries to make it cosy and convenient for you.
The guy himself is very friendly and responsive, also later in the evening.
So in summary, I wouldn't book it for a romantic Antwerp weekend with my crush, but for every other purpose it's perfectly fine.