The Australian Hostel is in an excellent location right in the heart of the Cairo downtown. The staff are so friendly and helpful, always willing to help you navigate your way around the craziness that is Cairo. The facilities there are fantastic, the wifi is excellent and there are always hot showers.
I had a great stay at Orient Gate Hostel. The shower there was fantastic, a constant stream of hot water. Mohammed's hospitality was fantastic, he was so friendly and welcoming. He was able to organise a free shuttle to Petra for us and helped us arrange transportation for our onwards journey, without which we would have struggled to have got to our next destination.