We've just returned from an 11 night stay at Carsten's apartment. There were 4 of us (two adults and 2 children) and there was plenty of room for us all. The apartment was clean and fully equipped for all our needs, plenty of equipment in the kitchen for cooking and some bits to get us started which was helpful. The air conditioning was much appreciated during the hot weather and the terrace was lovely with great views of the city.
The apartment was in a brilliant location, near two train stations with links to get all over the city. Supermarkets were close by, as were a variety of cafes and restaurants.
Carsten is a fantastic host and he welcomed us to the apartment, showed us around and was always available to answer any questions we had, communication was brilliant. Overall it was a brilliant stay and we really enjoyed our time here.