Cute apartment, great location! Volker was very accommodating. Very nice having bikes available as well. Wifi was fast and easy to connect to. Read about street noise in other reviews, but it actually wasn't too bad. The church bells do start early, though, and if you have the windows open they can be a little loud.
Just a few items to address: There were some issues figured out where exactly we had to go, as the key is in a lockbox in an alleyway, but the actual door to the apartment building is down the street a bit. Once you get inside, you have to go through another door, then up to the second floor, and the apartment is the unmarked door in the righthand corner. This part was not all that clear as there were no English instructions about it. The apartment also gets quite hot in the summer, so I might advise adding a small fan or something to get some air flow. Also, when we got there, the fridge was unplugged. At first I thought it was broken, as it's tucked under the counter so you can't see the cord, but then I slid it out and realized we had to plug it in. Since it's listed as an amenity, it would be nice to have instructions about that as well. Finally, the host does have some of his personal items around the room, such as family pictures, child's drawings, clothing, papers, etc. Would have been fine if it was discreet, but they're kind of all over and in the same places as the available towels/sheets/etc, so it wasn't clear what we were allowed to use and what was off limits.
All in all, it's a lovely home in an AMAZING location with just a few minor improvements needed. Would recommend if you have 2-3 people and want to be in the middle of a great part of town.