BerlinSurfHostel's apartment is extremely conveniently located for a first-time visitor to Berlin. Groceries, bars, restaurants, U-Bahn stops, even a self-service laundry all are 5 minutes away or less. Walkscore.com gives the address a 98 rating, in other words, a walker's paradise! Other guests have commented on it being somewhat noisy, but we had windows open most of the time and even at night the street is quiet for an urban setting, in spite of being near a very busy street a couple doors away.
Volker, our host, was very accessible by phone and very friendly and helpful. The apartment was quite clean, well-lit, and well-furnished with what we needed for a comfortable stay. Having a dishwasher and a washing machine were very helpful!
We spent six nights there and were very satisfied with our experience. When planning another trip, this will be our first choice if it's available.