Nice and affordable hostel to stay in Amsterdam.
Mixed rooms by default, so be open minded or ask in reception for same gender room.
Here you'll meet people from different countries and cultures; that's for sure.
Young and nice staff; they are welcomy and they all want to go to your country someday.
25 minutes walk to Centrum, so you might consider to buy transport card if you don't like to walk too much (return at evening was the hard part for me).
Breakfast buffet is really worth the 7.5 Euro.
Also, bring with you a towel, shampoo and lock if you don't want to spend another 10 bucks.