Nice place, good location, on the ground floor, had everything we needed. My husband, myself, and our 6-month old daughter stayed here for 3 nights.
*****APARTMENT*****: On the ground floor—perfect for us and our stroller! Clean with all the amenities. Extra towels were provided which was nice. They even included a pack n play, high chair, and baby tub for our daughter!! Bedroom is small—basically a bed with a bit of walking room around it—but was fine for sleeping. We unpacked all our stuff in the much more spacious living room / kitchen area—not enough space in the bedroom for luggage or the heaps of clothes/toys that we explode everywhere upon arrival. 😉 If we had had another friend with us I think it would have been too tight to be comfortable. The place is clean and furniture in fine condition, however the apartment itself (walls, bathroom, etc.) is showing it's age. It didn't bother us at all, but if you want that pristine new modern apartment feel, this probably isn't the place for you. The photos are accurate so look at them.
*****HOST*****: Sedat has this airbnb process DOWN. Holy cow, I have never received such immaculate instructions about arrival and departure and things to do. He let us know how to get to and from the airports (we left and arrived from separate airports) and told us what time we would need to leave to get the train and be there in time. His friend (apartment manager?) was waiting for us upon arrival and was pleasant even though we were running a bit late. Told us everything we needed to know, handed off the keys, and let us know how to "check out" when leaving. Communication was A++ from start to finish.
*****LOCATION*****: We were attending a conference so we didn't do much exploring of Berlin, but it was the perfect location for us. Quiet street, 5 minute walk to the conference venue, food and bars nearby, and easy to get the stroller in and out of the apartment.