Although I never met Jens in person he was brilliantly helpful before and after I arrived at his great flat. The flat is lovely and has everything you would need for a weekend or longer and the location is great and easy to get to and from the centre of Berlin. Jens also helped me organise the rental of a bike for the month from a friend of his which was excellent and far cheaper than using the metro or hiring from a tourist bike shop. Jens has some great people around him who were always available to help me out if I needed it. Overall a great experience!