We needed somewhere to stay over the long weekend for the Berlin Marathon, and Stéphanie's apartment fit the bill perfectly for us as a married couple away from the kids for a few nights. It was brilliantly located near to Hackischer Markt, and allowed for a great base for exploring the city. We were able to check in very early, and drop our bags, which was really appreciated after a super early start/flight that morning.
The only thing I would change/add would be to have a sofa, as the apartment is lacking any sort of real 'living room' - at the end of a long day exploring (or running!) then it would have been nice to be able to crash on something comfortable and watch the TV.
However, that is a minor thing and otherwise this was just the right apartment for our trip.
Thanks for a great stay!