We had a great stay at Jürgen's apartment.
It was exactly as described and actually looked better and was more spacious then the pictures suggested. Large enough for two persons for sure.
The bed was comfortable and the kitchen was well equipped. Bathroom is very nice too and everything was super clean and tidy.
The apartment is very well located next to the metro and bus stops and next to the museum island which can be reached by foot in 10 minutes. Also the old Nikolai neighbourhood is only a few minutes away.
Jürgen is very responsive, accurate and very helpful.