Stayed here for a 4-day business trip. Like others say, the staircase to the room is a bit narrow and tricky if you have a luggage that is wider than your body — but that only matters when you are checking in/out.
There is a balcony standing out to the street and you can watch people touring the downtown and it was cool.
The bedroom was located toward the other end from the street and I grabbed quiet sleeps at night.
I especially liked the spacious shower booth, it is exactly in the picture and also appreciated immediate hot water.
Will recommend anyone who wants to stay at the heart of Brussels.