Very small and steep stairs, very tight room, no social area, no fridge, no kitchen, the only places where you can go are : room, bathroom, reception and the street of course. very small bathroom and sink (1 bathroom/floor), only cold-water-shower, no luggage locker. there's a wall chart that remembers guests to smile, but the receptionist doesn't smile (I mean the taller one). 10EUR as a deposit for the key :/
When booking, I chose to pay in cash, but I was surprised that my card was charged following booking confirmation. I recommend you guys this hostel only as a last resort. for me I'll skip Amsterdam in this case.