I was in Berlin for a conference and stayed 5 nights at this apartment. It was exactly as described if not even better. All communication with Cornelius was prompt, courteous and he answered all my questions.
The apartment was easy to find and close to public transport access. This made getting around the city very easy. My conference was at Messe Sud, the other side of the city but public transport access made it easy to get there.
I spent some time just walking around the neighbourhood as well. The area is lovely with nice parks, cafes, bars and galleries. There are supermarkets close if you need anything at all.
Everything in the apartment worked well and there were very clear instructions about appliances, local amenities and transport if you needed them. The views from the balcony across the city scape were great.
If you are staying in Berlin I would highly recommend this apartment. Thank you Cornelius.