This is a beautiful apartment and it I hope it's available the next time we come to Berlin. It is very spacious, bright and airy. There are two great sun terraces which are full of plants (watered automatically). It's very well equipped.
The location is great. In a non-touristy, residential area with lots of good local restaurants and bars. There is a U-bahn station very close.
Manuel was extremely helpful and kind. He was very welcoming on arrival and spent time giving us lots of local recommendations and showing us how things worked in the apartment. During our visit, he helped us organise car hire. We didn't have any problems with the apartment but I'm sure he would have responded immediately if we had.