I have trouble thinking of any way Louis could have made things better. There were a number of very nice touches which we used with pleasure - the restaurant recommendations, the host's iphone so that we did not incur data roaming charges on our phones. All very thoughtful. We will definitely be referring other friends to Louis and would plan on booking with him again. The neighborhood was great fun, and although we enjoyed the rest of Berlin, we could not wait to get back to his flat in "our" neighborhood. If you go to Berlin, plan on staying in Prentzlauerberg.