What a cozy, quaint apartment close to transportation to Schönefeld airport (10 mins door-to-door) or into Berlin (about 30 mins by S-bahn).
We had a lovely stay. Check-in was simple (our hosts generously allowed us to arrive late in the evening). The apartment kitchen was well stocked. The bathroom clean. The bed reasonably comfortable (it's a pull out couch, so as other have mentioned you might feel a bar, etc but it was easy to compensate for and the bedding was wonderful).
Our favorite part was getting to stay in a real German neighborhood, shop at the local grocery store (located at the entrance to the S-Bahn, a 5 minute walk), and enjoy the garden views from the windows of the apartment. Highly recommend.