i highly recommend this place. Even though i haven't met Lisa in person, she has been very responsive and helpful.
The apartment is like the description and the pictures, very nicely furnished. The mattress is confortable and it's quiet so we've had a good sleep.
I've stayed with my sister for 4 days and the location of the place is really convenient to discover Berlin : close to an historic part of the wall that you can visit and also to MauerPark and Oderberger Strasse which are just perfect for a typical sunday in Berlin (flea market, cafés, brunch, shopping...).
I would definitely come back !