I and my boyfriend stayed a week at Jean Daniel's place in sunny May Berlin. We spent quite some time together during the evening and the morning. He always offered us some wine, beer and coffee and we had great conversations about Berlin, how the recent history of this city still resonates currently especially in the minds of people who had experienced the war. Following JD's advice we have visited the STASI prison, the zoo, Teufelsberg and Tempelhof. JD can make you discover aspects of the city that are not presented in standard guidebooks.
His neighborhood (northern Wedding) is one of the last ones that are still not "occupied" by tourists and can really make you feel the local vibe of the city, with the Turkish community (I had the best shawarma there!) and bars frequented by locals only. Just next to his place are really good and cheap places to have food or drinks.
The apartment was very comfortable and luminous. The kitchen has all utensils and condiments you need to cook nice meals. We even cooked dinner and ate together once.
There is an African bar 4 or 5 stairs below but we were not bothered to sleep.

We definitely recommend staying at JD's place!
Yumi&Gianluca