Kelly's partner Gillard was there to greet us and was very helpful with suggestions as to what to see and do in Berlin. Even though I never got to personally meet Kelly, she was always on hand and replied instantly to any queries/messages that I sent her.
The flat was clean and homely and just spacious enough for the 4 of us. Location was great with 2 tube stations close by. We had a fab 2 days in Berlin and would definitely be back.