This is not the nicest place to stay at, although probably the cheapest in Rome.
It is located not so far from the Vatican. You can reach it from the train station by taking a metro to the Vatican and then another bus (check out bus number on website). The busstop is right at the hostel.
We stayed in a dorm room with 8 bunk beds. Sheets and locker included in price, as well as regular breakfast.
Once again, this wasn't the nicest area. And yet once again, we bumped into a creep. My friend Maud was standing at the window one night, hanging up our wet cloths when she told me to come and look at this strange man jumping up and down across the street. When I came to the window, he pulled down his pants and then ran away into the bushes. Later that night, we wanted to take the bus and the guy was standing there again, but didn' get close to us. Scary experience. Everyone should be careful. At the time we were there, there were two "stations" for internet. You had to buy a card at the reception.