It is located only around 45 minutes from the airport via public transport system.
The location is perfect: 5 minutes to the nearest M10 tram stop, and 1 minute (literally!) to a middle-sized supermarket. The neighbourhood is very quite.
The flat is very comfortable for 2 people. It has big windows and a balcony with a chair, and is indeed very sunny (to the point you have to hide from the sun behind the curtains!).
It has a huge table with solid speakers, so should be very comfortable for people like me, who as working in the flat the entire stay & who love high-quality sound. Also, there's a really fast internet. In fact, during our stay there were two separate WLAN connections.
I'll have a handful of really warm memories sitting in the kitchen, drinking sweet grapefruit Schofferhofer beer during evenings.
Me & my girlfriend Olga were really-really lucky to get to live in Oliver's place. It became our second home for 3 weeks. Its coziness helped us perceive Berlin in a beautiful new way.
Highly recommended.