I like Hostelbookers as it clearly designed, easy to surf on and the cheapest I found.
Whenever I compare Hostelbookers with other booking websites (in particular Hostelworld), in the end I always complete my bookings on Hostelbookers. One reason is that it is the cheapest, but another is that I can get to the cities or regions I need much easier than anywhere. On top of that everything is cleary arranged and easily accessible whenever I need an additional information. I had never any trouble with HB. So keep up the the standard!