I stayed at this hostel in 2009, and it was one of the best hostels I've ever been to. It's in a great position, not far from the train station. It has a cozy bar, and great decor, with vinyl records from great bands of the twentieth century.
I loved it - I spent two nights at this centrally located Warsaw hostel, and it was enough for me to know that I'll be back. The rooms (three bunk beds, each with its own light, assigned locker and privacy curtain) and the common areas were spotless. The bathrooms have some room for improvement, but they were good. I loved the sitting room/kitchen, where breakfast is served - toast, ham, butter, jam, tea, coffee. The location is great, quiet, but still close to downtown, just behind the main street. My room was overlooking the street, but I didn't hear a thing at night. A good option for backpackers.