This is a spacious, clean, comfortable place to stay. It's about 5 minutes from public transit. We got the day pass public transit pass for 7 euro and took it all over the place. Simon's place was close to lots of restaurants and shopping and wasn't far from anything we wanted to do in Berlin.
We stayed with our 6 month old baby and she was comfortable in a crib. The place has large hallways and a separate kitchen so we were able to put our baby down and still keep some lights on.
I would definitely recommend this place!