I stayed in the flat with a group of 7 students when we visited Berlin for a conference. So we didn't use the flat much for living, i.e. we never really used the kitchen except for breakfast. There's plenty of international food in walking distance.

The flat was exactly as described and very clean. The key system works very well and makes it very easy for large groups of individuals to return whenever they like.

Unfortunately, I didn't meet the host because I arrived a bit later than the rest of the group, and had to leave a bit earlier.