Sophia's place is just awesome! Super close to nice restaurants, grocery stores, parking house as well as public transportation infrastructure. It's very easy to get to a city center from there while you can still enjoy calm borough of Friedenau with not too many tourists.
Apartment itself is nice with a lot of light, really well equipped, clean and spacious. We really enjoyed our stay in Berlin and having chance to be in Sophia's apartment was a big part of that.