I recommend this acommodation. The location of the flat is amazing. It is just a few minutes by foot to the beautiful huge park (we were in Berlin with a little baby so I really appreciated it), Edeka (grocery store) is just 2 minutes by foot. I always felt safe in this area.
There is really everything what you need for your long term stay. I esspecialy like the spacious living room.
When there was neccesary to change some staff in the flat, Julia solved it immediately. She also gave us a lot of usefull tips about living in Berlin. She was really responsive. On top of that there are very kind and friendly neigbours. They also were willing to help us anytime during our stay. It was just an icing on the cake.