First of all, Patrick is a great host. Very hospitable and friendly. Check in and check out went smoothly. The place is very close to the Yser metro station in 1-2 minutes walk. About every 3-4 mins a train from there can take you around the center of Brussels, going through Brussel-Zuid (same as Gare du Midi, and same as Brussels-Midi). Frequent buses to and from Brussel-Zuid connect to Charleroi Airport (~8 euros/person). So, from Airport to Patrick's place it takes around 1 hour (~40 min by bus from Airport to Midi station, and around 20 min from there to Yser station.
The apartment itself is very cozy, clean and self-sufficient. The neighborhood is quiet, I mean not crowded and no street noise at night. Can't say about the day time, since I was out to enjoy the atmosphere of Brussels. All in all, I had quite positive experience. and large part of it was due to Patrick's place.