We had a great stay at Patrick's house. As we were traveling with kids (3y and 4m) and grandparents, the spacious and friendly house, particularly the large living/dining space/ open kitchen and the awesome garden in the charming and quite neighborhood were the perfect spot. Patrick was friendly and very helpful.
As previous guests pointed out, some bedrooms are only accessible through others, and one shower/bath tub per 6 full beds and 2 bunks beds on 1st floor may be a little undersized for some groups. When traveling with kids also note that rodents and foxes are frequent visitors in the garden, as is common in Berlin, and that watching toddlers and washing hands etc. should be taken seriously.