We, six people, stayed at Florence's apartment for two nights and we were very satisfied with everything.
Unfortunately we didn't get to meet our host, since she was abroad, but everything was organized very well so that we could just pick up the keys from her neighbor.
The apartment is 2 minutes away from the next train station which gets you to the city center in about 20 minutes.
If we should visit Brussels again with six people, Florence would definitely be the first person to contact!