Franz's house was easy to find and we could easily find a free parking spot within 200 metres.
Although the street can be quite busy, nothing of that can be noticed from the inside of the house, since it is very well insulated.
S-bahn and U-bahn are within 10 mns of walking distance, as well as buses, several supermarkets and restaurants.
I would strongly recommend this house for a stay. The two two-person beds are very nice and all comfort is present, including WiFi, dishwasher, coffee machine (with free coffee!), rain shower, sofa, very large flatscreen television, and so on.
Franz is a nice and kind host and it is easy to make a check-in appointment, since he is very easy to contact and very flexible. If we come to Berlin again, I would like to stay in his house again.