Karsten was a great host. He gave us detailed directions from the airport to his flat and tons of recommendations for things to do in Berlin. He was also very accommodating to our sudden change of plans.

The flat was convienently located 1 block from the subway, which made getting around the city very easy. It is also larger than it appears from the photos.

The wifi connection was strong and the shower was the best one I've had in my travels in Europe so far.

I highly recommend Karsten and his flat in Mitte.