We had a nice stay at BerlinSurfHostel! The flat is located 5-10 minutes from the Yorckstrasse station, which is only a few stops away from many transit hubs which take you anywhere you could want to go in the city. The flat was clean and comfy. Only negative is that it is on a somewhat busy street and the noise from the street at night was quite loud, even when I used a white noise machine to sleep (this is only an issue should you use the sofa bed). Overall, a nice place to stay in Berlin!