We had an amazing time in Berlin and Salva's place was a great place to stay. Friedrichshain is a very cool area with a lot of atmosphere, and the apartment is in a nice, quiet street but very close to the restaurants, bars and clubs. It is also just a 10 min walk to the East Side Gallery, where you can walk along the remains of the Berlin Wall.
Salva was out of the country during our stay so we didn't get to meet him, but he was very communicative and helpful.