We stayed 4 adults (all family members) at the flat . The flat is spacious and lightful. Furniture and beds were nice and comfortable. Check-in/out were quick.
Kitchen has all the utensils required to cook and eat at home. Terrace is nice ; but be aware there is cooking smell coming from the restaurants below. Some of the view is very nice towards beautiful buildings in Grand Palace area and some of the view to ugly roofs. Pick yourself where you want to look :-)
Public Parking is an easy 5 minutes walk , costs 18 Euro/night.
The street is full of restaurants and pubs, within few minutes many choices for dinner.
The entrance of the flat is in a shopping center which is full of nail polish shops , there is an heavy and peculiar smell in the entrance. We were a bit surprised when we entered the building first time, many post boxes are broken, gave us an unsafe impression.

When we came to 4th floor , we realized there is construction going on the 4th floor, it seems the whole floor is being converted to apartments from some other previous purpose. Again we did not feel good all seeing this, it is an ugly entrance.
When we entered the flat it looked like there is renovation going on in the flat; unpainted walls, temporarily covered areas, etc.. I did not know what to say, we expected an elegant flat from the pictures. But it is not an elegant flat , so adapt your expectations accordingly. It just felt like the flat is temporarily built , or not yet finished.
We were too tired after a long drive , so we had a short talk within family and decided to stay in the flat.
One advantage of the flat is ; in spite of the buzzing area , being on the 4th floor, it is relatively silent, so we slept fine with open window.
Overall we did not like the flat really, it just does not match the expectations ( and the price paid) the description suggests.
I do not think we will stay at this flat again when go to Brussels next time