Most importantly: check-in is not before 1 PM. Very frustrating to sit waiting! Otherwise, hostel is an old converted barracks, and it shows. Long fairly sterile corridors, rooms quite cramped, ablutions generally pretty good but shower water pressure can be a bit poor. Main social area is the old drill hall, perhaps too large for the number of people staying when I was there. Has an on-site bar, clearly a party hostel. Kitchen much too small for the size. Overall? Good, but not great.
Quite tough to find, but once found excellent hostel, very good location near centre of Old Town, very friendly, will definitely be going back!
Fantastic hostel, really enjoyed my stay, great location too. Very impressed, has set the bar high for future trips!