My dorm room (of 5 beds) was empty for 2 nights in peak season, this says something about the hostel... There was no common room or kitchen or any form of socialising at this hostel and as a traveler this is what I was after. I was also very disappointed with the hostel because on the 1st day of my stay, I asked to cancel my 3rd night however they would not allow this even though the terms and conditions state otherwise. I had to pay for the 3rd night even though I did not stay that night.
Hostel cosmos was the worst hostel I have ever stayed in, it was so bad we checked out early and found another hostel for the rest of our stay. It is dirty, smelly, small, bad facilities and the staff were rude. Do not stay here.
Best hostel I have stayed at throughout Europe!! Good location and facilities, nice staff and great rooms with air con. I highly recommend!!