Frank is a wonderful host. Because of ryanair - who dropped us in Hannover - we had to take a train at night so we arrived at 7am at the house. That was no problem for Frank who opened his door in his pyamas. :-)
Frank is a very good communicator, we had nice chats. He also has some great guest coming over on saturday. Don't hesitate to book in his house because he'll give you a unique experince of Berlin.
Apart from the great host: everything is clean, u-bahn is from a 1 minute walk, it is a nice neighbourhood with a lot of breakfast, lunch and diner opportunities.
We surely will come back!
Sara and Hannes