The flat is very spacious with a good sofa next to the heating, it feels especially warm during this cold winter.
Location-wise, it is not central to Brussels, but close to a big park, which is safe enough to walk the dog during day time. A short walk there are grocery stores.
The only downside is that, there are few defects during our stay, one of the ceiling lights was broken, and kept on flashing, so we cannot really turn on the kitchen lights. The other one was the internet, which was down during first 2 days.
Having said those, the flat is big and spacious, would still recommend it.