Florence's place is a spacious flat right in the heart of Brussels. My partner and I were working remotely for 2 of the days we were there, and the internet was stable and the place catered well for being inside for most of the day. When we were out, we could get to nearly everywhere by walking. We had some recommendations from friends that had lived in Brussels, and all those recommendations were within 20 minutes walks (many sub 10). It is also located right near the central train station, so if you do need to go anywhere, it's very accessible. For example, we went to Brugge for a few hours on Saturday and could do that very easily from the apartment.
I'd definitely recommend Florence's house to anyone looking for a spacious and well-located flat in Brussels.