The hostel has a lot of rooms and beds so feels a little commercial, but for 10€ a night in a dorm bed, it's hard to complain.
The common room/kitchen/dining area feels very warm and inviting and people who work here are generally friendly and extremely helpful. They hand out maps, help you plot your public transportation, give you a "mini tour" of the hostel etc.
The location, while not exactly "Ideal" for Berlin, is good for exploring the Western part of the city, and there are S-Bahn and U Bahn stations in the immediate vicinity. The Helensee S Bahn station is also a stop for some very convenient bus routes. Just ask the reception for info!
Guests have kitchen access and there is a cheap supermarket just a few metres away!