Such a unique way to stay in Berlin! Frank is everything a host should be and more, I felt right at home at the Pension. And the guest house itself is even more of a treat! I stayed in the gold room which had awesome artwork to stare at when laying in bed all day with a hangover (the bed itself was the most comfortable bed you will find when travelling!) you will leave with a camera full of photos of unique Berlin art :) Highly recommended!