I stayed at this hostel with friends in June, 2012. Wee took a room with 4 bed for 4 people, so I can't say about the dorms.
Overall impression was good. The rooms were clean, and in our room we didn't hear the noise from the drunk tourists. Although, to be honest, it was the white nights period, so we weren't in the hostel really.
Wi-fi did work, and that was great.
One receptionist girl was extremely helpful. Not only did she answer where this-and-that-what's-it'called-not-quite-sure cathedral was located. But she actually found it on the map, showed us, told us how to get there, googled their working hours, and even called them to ask how much the tickets were!
Although another receptionist wasn't nice at all. We had quite an accident when a drunk tourist got to our room and did some gross stuff (he was drunk, right). When we came back to the reception to complain and asked to clean the room, her first question was "so, did you just leave the door unlocked?"
Location is good.More