If you can manage to book this apartment, do so straight away without reservation! The flat is very modern, bright, comfortable and clean. It has everything you would need for either - short city break or a long stay.
Moritz is a great host, he made us both feel welcome and took very good care of us. We were late coming from the airport, and he took his time to wait for us for around 3 hours and show us around. He also recommended a lot of things to do for us in Berlin - restaurants, coffee shops, museums and various landmarks.
At the end of our stay he also gave us a lift to the airport, which was very kind of Moritz.
Great host, perfect flat in the heart of Berlin - book it quick!