I stayed there for three nights with my girlfriend, for a "surprise gift" weekend. The B&B is a three-room flat on 1st floor, with a small kitchen where guest can have meals, cook and store food in the refrigerator. Our room (103) was quite small, with bathroom and TV, facing the backyard, so no noise at all from the outside. Everything is clean, breakfast is basic but you can eat as much as you can. The B&B is located in S.Giovanni in Laterano area, 15 min walking from the Coliseum and Termini Station, and has a metro station (Manzoni) in the proximities (3 minutes walking). Not much like Kensington... but not even like Bronx I'd say!
If the other guest are nightlife addicted sleeping might not be very easy, for rooms are very close one each other and walls quite thin...
I don't know exactely prices and I'm not going to look for them (it was a present!), but my girlfriend told me it was definitely a cheap accomodation compared to mean prices in Rome!

We arrived late and were met by Daniela, who was very accommodating - even assisting us with our heavy suitcases. We found the triple room to be a good size, comfortable beds although there was quite some noise from the main street during the evening. The bathroom was quite small, yet very clean. Breakfast was simple - consisting of croissants, danishes and tea, coffee and juice. The kitchen contained washing facilities, a refrigerator and cooking facilities. Location was fine and not dodgy at all. The Metro was very handy and just a short 5 minute walk. We found the Colosseum to be a good 20 minute walk, as is Termini Station. All in all, despite the noise from traffic, this B&B is highly recommended.

Hotel was very good with a nice breakfast. The staff were very nice and always eager to help out. The only problem was that they did not speak much english and they did not have a 24hr reception. But the rooms were spacious and the bathroom was good.There was a kitchen where we took our breakfast everyday which consisted of croissants, tea, coffee and biscuits.I will definately like to go back and stay there again!

I would give only 2 points on "cleanliness" - the room is actualy tidy, but noise from the street is too much in room 101. Suppose same noise in room 102, probably much better for room 103, which faces the space between the blocks. Actually this would be the only negative comment for this b&b from my side. Very communicative location - close to the the Manzoni Metro station and bus stop, Coloseo is at 15 min by walk, same for Termini station. "n1" bus has also stop there - so excellent for those who come back home from the night life in the small hours. Our room had a private bathroom, other 2 rooms have too (I suppose).