The reception lady was pretty unfriendly, but not directly unfair. There are extra prices for literally everything, like £5 for a towel that you have to buy. The breakfast sucks like you would expect it to. The beds in the dorm have their own curtain, this is really nice, as you can leave your non-expensive valuables behind it (and save the locker-price). At your own risk of course.. Location adds up for much though.
Very nice hostel in the middle of everything! Everything was more than satisfactory, we were very pleasantly surprised. It's located in a party-street, so there is some noise in the evenings, but we were lucky and got a room away from the street. Otherwise this might be annoying, that be if you're not planning on partying yourself (which I definitely urge you too, as Krakow has incredibly many incredibly cool clubs!). So go to Krakow and go to this hostel! And bring earplugs..