We have spent a wonderful week in Berlin and enjoyed our stay at Patrick and Kate's place very much! The hosts were very prompt with their replies and were also very pleasant and hospitable. The apartment was very cozy and clean. There's a balcony with a nice view and a spacious bathroom with a huge bathtub. There's pretty much everything you need for a comfortable stay. The only thing that we were frustrated about at first was our separate stairway (without an elevator) as we didn't expect to have to come up the 6th floor every day. (There is an elevator at the main entrance, but to use it you'll have to come through the hosts' private apartment). However, we got used to the stairway and well I've lost 5 pounds during this trip so I guess it was an advantage after all ;)