I never met the host as we collected keys from his shop nearby. However he was always quick to answer emails and he left loads of tourist information in the flat to inform us of anything we weren't sure of.
The flat was just as advertised. It was spacious, clean and comfortable, the temperature in the city was below zero while we were staying so it was always a pleasure to come back "home" to a warm and cosy space. The bath is huge and a lovely way to warm up after a freezing day of sightseeing in Berlin.
The local area is the quieter part of Kreuzberg and suited our needs perfectly. We were so centrally located, it was easy to get to and from the flat either by foot or public transport.