We used this and other apartments in the building for our company's yearly kick off. Clean, spacious flat with everything you need. Ben and Simon are wonderful hosts, who make you feel very welcome. The only thing missing is an extra toilet in the apartment. We would highly recommend this apartment.
The host was on time for our check-in and the procedure was easy. He went through every single thing in detail and was always available when we needed to call and ask for something. The apartment looks just like the pictures but better. There is so much space and it is clean and modern. All the amenities were there. We enjoyed the speakers the most and the fact that we could connect our phones to the TV via ChromeCast so didn't need to use any wires. The balcony is nice and jazzy with the view of the train tracks so it feels like the urbans in New York lol.
The location of the apartment is good too with buses that can take you right into the city centre.
Honestly had no complaints and I would love to book again when I come to Berlin.