We had a wonderful time. The location is unbeatable. The view from the rooftop, as the sun sets and the lights come on at Grand Place, is excellent. The apartment is spacious and comfortable.
A few negative things:
The rattling noise from the HVAC system is a problem if you're a light sleeper. As other reviews have noted, the functioning of the elevator is inconsistent. If it would be a problem to walk up and down five flights of stairs for a day or so while waiting for elevator repair, then this may not be a good choice for you.
It is an excellent location and a nice space overall.