Super nice area on the Lankwitz Canal in Kreuzberg.
Very close to the U1 line with two stations near by.
There’s a library bar that is a cool place where to enjoy your drink and chats.
They offer city tour and bike rental (check the website for price), and they even have a blog!
Breakfast is quite good, in German style and costs around 6,50€
One of the greatest thing is that the check-in can be done at any time (but check out is still before 11:00)