I offer my 1-room flat near Warschauer Straße for the time I am not in Berlin. You will find good restaurants in this area, a few nice bars and good clubs to enjoy the Berlin nightlife! There are some supermarkets here (from cheap to organic) and a lot of shops to buy clothings. The S-Bahn and metro are in 5-10 minutes walking distance, so you could explore other neighbourhoods. The flat itself is not in the front building - so it is relative quiet.
I hope you enjoy your stay here!