I stayed one week. Jon was very helpful. The guest room is small (typical for this area), but I could use the living room of the apartment anytime. The residential neighborhood is great. More restaurants and wine bars than even a longtime visitor could visit. For jazz fans: two major famous jazz clubs within walking distance. The area is safe and the apartment is very quiet. There is even a closer subway station (2 minutes walk) than mentioned in the guest Information booklet.