Jolanda is a super hospitable host, her replies were very quick and helpful! The apartment is great, I think it's perfect for a couple or a group of three people to stay and explore Brussels. In terms of location, the apartment is close to 2 metro stations, a bus stop and if you want you can take a long nice walk to the city center.
Also the apartment quite close to the airport, so you can take a taxi for rather cheap.
Overall had a great time here! All the best to Jolanda and Simon! :)