I stayed here two times. The first time it was a room for 2, and the second time - a room for 4 people. Both times went great. The place is clean and cosy, even though the rooms are without windows. Also, the location was perfect, right in the heart of the city and very close to several public transport stations.
I highly recommend this hostel to anyone who's looking for affordable and comfortable accommodations in Stockholm. I'll definitely stay here again :)