I stayed in Marine's flat with my 2 grown up children in August. The flat is as described, clean, tidy and handy for the S bahn. It is spacious and has 2 nice balconies.
The area is busy in the evenings and there are plenty of good local restaurants, Marine has some suggestions but didn't mention 'Bird' opposite which is a good burger joint.
Mauer Park is also interesting we saw amazing karaoke on Sunday evening as well as lots of football fans going to watch BFC Dynamo one afternoon.
A good place to stay to get a real feel of Berlin.