Stayed for 4 nights in mid-April with my girlfriend.
Getting here is very easy from Termini, provided you plan ahead as the local maps (like the one you might get with your Roma Pass) typically cut off just before they reach this neighborhood. Just go to Re di Roma on line A, walk a block toward the Coliseum, and you're there. There's also two buses--85 and 87--running nearby which will get you close to practically anywhere you want in Rome at any time of day. As a result, while the hostel is located outside historic Rome in a residential area, its very easily accessible and without a long wait. The area is also nice enough, and you can find a good amount of pizzerias and restaurants nearby. We couldn't find any local supermarkets, but we didn't look very hard either.
The actual hostel is basically two flats in an apartment building. The main one has a lobby, a bathroom, the living room, the kitchen, and what I think was 4 rooms. The other one, on the adjacent side of the floor, has a couple more rooms, a lounge area, a bathroom, and a little veranda. The kitchen seemed pretty dirty, and I would suggest washing everything you use there, but it was not filthy. Like something you would expect from college students. The bathroom was sufficiently roomy, had hot water even when we were the last to shower, and was quite clean (though inevitably people would drip water on the floor). The toilet flush is very loud, though. The living room is pretty big, has a nice TV, and often has some guests hanging out there, creating a nice sociable atmosphere. The main lobby also has a computer with free internet access, which is definitely a rarity nowadays and much appreciated.
The room itself was spacious enough. Not huge, but certainly not cramped either. Well furnished and appearing to be as clean as you would expect. Every morning and night the wall around the radiator seemed to make clicking noise, even though the radiator itself was not on, but it was more of an oddity than a bother. Decorated well enough to make you feel comfortable, but still somewhat spartan and not especially cozy.
The service also seems to be quite good. The main owner speaks very good English, has a very polite and friendly demeanor, and comes by every morning to cook breakfast. The other staff members who hang around in the daytime to clean and check guests in speak English substantially worse, but still to the point of understanding you and being understood themselves. The service does seem occasionally spotty, however. For instance, they have a policy of changing your sheets and towels every other night, but for us they missed it even after we specifically made a mention of it. They were changed the following night, but guests should not have to raise the issue to get it done.
The free breakfast is one of the best you can get from a B&B. Boiled eggs, fresh bread, fresh (though mass-produced) pastries, new and strong coffee, yogurt, cereal, cold cuts...you won't walk away hungry. There often seemed to be pastries and food left over, too, so you could probably grab it if you happen to drop in later on for a quick snack. What's even nicer is that breakfast is specified for 9-11, but even if you wake up afterward you can still have some, provided no one has finished it off by then. No one will remove and lock it up, as most hostels do.
So all in all this place is the sort a 4/5 ranking is made for. It's very good, and you walk away feeling like you got your money's worth, but it falls just a little short in several respects from being a real gem (though the breakfast is truly exceptional). Still, I would definitely stay here again.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.