Maxim is very knowledgeable about Berlin. He offered great tips when I asked about a good coffeehouse to work in, and about public transit options. (The apt. is close to the tram, U-Bahn, and S-Bahn, so it was convenient to get almost anywhere in Berlin I wanted to go.)
We shared a brunch in the cozy kitchen and chatted about life in Berlin. It was a very quiet, gemutlich place to stay, for a very reasonable price.