Jen's apartment was a real great choice. It's not only very well located, but is itself a wonderful place. It is superclean, and well equipped. Jen is a nice and well prepared host, was very flexible on our arrival - we had a late flight to the city. Also she is available for questions basically all the time.
She also has an exceptionally good city guide with her comments and rates for several places to visit - or not to visit.
You have your own top floor of 4, along with the small, but great located terrace, which is a fine place for a breakfast or a coffee over the roofs of Brussels.
The metro is like 5 mins walk, but we walk into the main square as well in around 20 minutes in nice areas. Also there are a lot of restaurants, bars, shops, grocery stores, etc in the very close neighborhood.
Overall very satisfied with the place and the host as well!