We loved staying here! I had planned to move on after 3 days when my friend was leaving for work but I stayed an extra 3 days and took some day trips using it as my home base.
The apartment is better than the photos, very clean, with a new washroom. It is on the third floor so you have to like steps and luggage. This was no problem because if you don't know Rome, be prepared steps are everywhere. You have to take a flight of steps just to get to a flight of steps. No sweat, you will have gorgeous legs after a vacation to Italy.
Trastevere is noisy and happening. It is s lot of locals hut a lot of students from the local American University. The restaurants are delicious with plenty of good shops and small markets with cheap, great wine. And dietary needs are easily met if you have restrictions. There are street performers everywhere and the apartment is right at Ponte Sisto bridge and a popular piazza where singers perform every single night til the small hours of the morning. This is not the kind of place I normally would stay at had I known but we had zero problem here. Slept like a teenager every night, exhausted from full days of sight seeing. There is a juice bar, a bank machine, variety store, gelato, and a couple great restaurants within 30 seconds. A 5-10 minute walk through cobblestone alleys gets you limitless restaurant choices.
Elena is the most helpful host, very thoughtful and understanding about our long train commute between cities and timing for arrival. We have Celiac Disease and she gave us a list of great restaurants to choose. Her favourite choice Mama Eats was ours too! We went there several times, it is filled with locals. From Friday-Sunday night it is packed with a line up too, get there before 8pm. Antica Caciara Trasteverina is a great meat and cheese shop with a good wine selection. The young guy is excellent picking wines.
We walked to everything and did not bother with public transportation.
So you know: in heavy rush hour a taxi from Termini to the flat cost 11,60 euros once and 18 euros another. Going cost 13 euros in zero traffic at 5am. So there is a variance between drivers but absolutely do not pay the 50 euros quoted for flat fee from the Termini.