Andrea is a kind and friendly guest. I did a nice conversation with her (and their guests). I lived in private room for 7 nights. It's a nice room with a big bed and the necessary things (a mirror, a chair, coat rarck and hanger,...). I could use a common kitchen (with fridge and also two eletric plates to cook) and a common bathroom. When there been new guests, Andrea comunicated me in time and I really appreciated that.
The apartment in near a S-bahn (15 minutes by feet - You can arrive from Schönefeld airport in one hour and without changes; you can go where you want from this with also some change) but also other transportation. At 20 minutes by feet there is a "Penny" market; at 15-20 minutes there is an entrance to Tiegarten and/or the Charlottenburg castel. The apartment is near the sprea and you can walk near it: it's nice.
If you wanna visit Berlin and you can appreciate to have some people in the same appartment but with your private room, I suggest Andrea and hers apartment.