We had a great stay at Josef's apartment. The apartment itself was exceptionally clean and very well equipped - nicer than the photos suggest. All the facilities were excellent. Check-in and out was very easy, with well explained self check-in instructions. We didn't meet Josef, but he responded very quickly to a couple of questions I had.
It's true that the apartment is above a courtyard with a motorcycle repair shop, as someone mentioned. This didn't bother us at all during our stay. It wasn't especially noisy anyway, but the bedrooms do not face this yard, so we were able to sleep with the windows slightly open and not hear any noise in the morning. In fact, we found the apartment to be incredibly quiet.
The area is certainly not the prettiest part of the city, so you need to factor that in if it's a dealbreaker. But the apartment is very well located, only a minute from the tram and a short walk to the metro station. It's about a minute's walk to Yppenplatz, which has some nice cafes and a bakery that stays open very late. And even though it's not a pretty part of town, I think it could best be described as quiet.
All in all a fantastic stay. Many thanks Josef.