It's a hostel, so that's what you can expect. Arrival is smooth, as there is a hostel reception. Rooms are spacious, but a bit basic (hard mattress, two single beds instead of a twin bed, one towel, no shampoo, ...). It's very central, on the main square of The Hague.
A major downside is that the building isn't well isolated, so you hear everything from outside or neighbouring rooms. They provide earplugs for that :).
All in all, quite pricey for what you get.