After our arrival to the hostel we found out that what we booked is actually not available. Two options were offered to us then. First sleeping in room with some stranger or sleeping in room without heating. We chose nonheating one distants 15 minutes by walk from hostel office. For 4€ it's kind of good service but for your review I had to pick up "very poor smile" many times.
Noisy mattrasses, if you want to move you can wake up everybody in the room.