The apartment was lovely and spacious, in a quiet block of flats.
It had more than enough space for the 4 of us, and the shower in the main bathroom was amazing.
The only downside was that the apartment was further from the city than we had expected (and we did check Google maps beforehand for travel times) and the buses were infrequent and often late. This wasn't Daniels fault by any means, but did impact our stay in Berlin.
There were plenty of restaurants in the area, though many of them only take cash.
We had a lovely time in Daniels apartment.