Stephan was really nice and gave us all the information we needed. The apartment is well located in the eastern part of Berlin so it's a little far from the historic places like the Reichstag and such but given that Berlin is a great city to ride a bike it's still doable (20-30 min bike ride). However it is perfect to go to clubs as they are generally on the eastern side. The apartment is maybe a little small for 5 persons but otherwise it was a good experience.