The flat is near a metro station and in there are a lot of restaurants and shops in the same street.
We flat is big enough for six people, but we had a problem with the heater that Jan coudn't solved. We were no able to have a hot shower... I think we should get part of our money back (WiFi didn't work either).
After all, this was a puntual problem and Jan's flat is a very good option to stay in Berlin.