The location is brilliant, very close to Dam square and 2 min from Klaverstraat the big shopping street. The Moroccan guy at the reception was very friendly and gave us a lot of tips. the breakfast was nice, there is a also a computer. We had a quadruple room with a sink, Beds were vERY comfortable but the floor was somehow dirty. Cosmos is basically what you pay for, nothing more. I would stay there again only if i was very tight n budget. It's also easy to reach from the airport

The staff was very helpful if we needed to find anything within Amsterdam, they knew the best places to go!
Right across the street (or alleyway) was a great little cafe, amazing smoke there as well. If you do stay at this hostel, I would suggest giving it a try (if you are looking for some smoke).
Perfect walking distance to every attraction in Amsterdam, and about a 5 minute (not even) walk to the train station.
I would stay there again when I go back to Amsterdam!

Great location in Amsterdam.
I really enjoyed my stay at this hostel, the staff were friendly.
Centrally located, and full of people from all over the world.
If you go by car, park your car on park + ride out of center. (6,5 euros per day, including train ticket to center).

While the location is decent, the noise in and around the hostel was extreme and the staff were rather rude and combative. They did not greet us with any kind of hospitality and were stand-offish towards our room the entire trip. In turn, we moved to Flying Pig which was a much better hostel.