This is a great little place. It is a converted apartment flat so things are a little different from a normal Hotel. A lot of reviewers were complaining about the noise, but room 1 was silent. I didn't hear a thing through the windows. The bed and towels were very clean as well.
The rooms them selves were a little spartan but honestly i wasn't expecting a lavish room. It's exactly what you need for exploring Rome and not staying in your room the entire time. The bed and pillows were very firm, but that's about the same all over Italy from what I gathered from other reviews.
The Hotel does have Wi-Fi and I never had an issue with it. A good solid signal with good speeds. There was a TV, but honestly i think i flipped it on once.

The location... that's the kicker. This place is great! you literally have a 10 minute walk to the Colosseum and a 15 minute walk to the Vatican. It's very centrally located and you can't get lost going home. You just find the Tibber river and head down river until you hit Ponte Geribaldi and head down the Viale Trastevere. After a long day of walking there are plenty of good restaurants around the hotel as well. I found a place called Da Vittiro, good service, great food and it wasn't crawling with people either. Check out Santa Maria in Trastevere while you're over there. It was my favorite church out of all of Rome.

The hotel staff (Sairis (sorry if I misspelled your name)) is very helpful and good to talk to. He ends up coming in at all hours to check people in as they arrive at the hotel. He speaks Indian, English and Italian and maybe another but I can't remember off the top of my head. The stairs up to the hotel aren't bad, just make sure you count out the right number of floors and dont try going into the door a level down... I definitely didnt do that. There is a small elevator to take you up and down if you have luggage too.

I would defiantly stay here again when I go back.

we wanted to be near the Great Synagogue in the old Jewish Ghetto in rome. this was a 10 min walk from there, in the wonderful trastevere neighborhood. these are suites, not a hotel. the staff was extremely nice, our room (#7) was gorgeous and very large. the bed was very comfortable. we have only the nicest things to say. would def stay there again and would def recommend it to others looking to stay in that part of town.

We stayed with our large family, and got two rooms that we could walk in between without going into the public area. The staff was friendly. The place doesn't have a sign outside, but thanks to the TripAdvisor information we were prepared. The rooms are high up, but still face a street with trams on it, so if you are a light sleeper, or have to keep the window open, you will hear it. We were ok with it. The place was very clean, the staff friendly, and value-for-money excellent.
We would go back.

my mate and I stayed in Sonnino Suite for 2 nights and what can I say, well, it was just what one needs for a 2 night stay in Rome.
The suite is really safe and secure, clean, comfortable and the host is a gent.
We had a fridge in our room and the beds were comfortable.
Most importantly for us as we were so tired from our road trip, the room was sooo quiet.
The location is perfect as you are so close to the city centre, without being in a very touristy spot and the public transport is great so you can be where you want to be in no time.

The area is great, if you want to experience local Rome.
There is an internet cafe on the right and a great little local pizza place and bar on the left.
The locals are so lovely, that you will want to hang out in this area in the evening.

The host was more than accommodating, meeting us when were arrived late and allowing us to leave our luggage there before our flight departure.

Simply what you need when staying in a city for a few nights.
Oh and breakfast is served in a little local cafe - perfect. Typical Italian affair but great none the less.

If I go to Rome again, I will definitely stay here.