My family (2 adults and 2 toddlers) stayed at Petra and Otto's place for just under a week and had a great time! Check-in was a cinch and the place was simply, but nicely, furnished and very comfortable. A big draw for us was the bedroom with 2 single beds that were perfect for our toddlers. One thing I loved about Petra and Otto's place was that it came fully stocked with everything you'll need to get started (and is often missing from other AirBnB joints): toilet paper, salt, wireless, coffee! Finally, this apartment is delightfully situated in a quiet, but highly central and walkable, area of Berlin with great transportation connections. Highly recommend!