The Pros - seems to be recently renovated, very clean, convenient location to restaurants and still walk able to other areas of the city, close to a taxi stand if you don't feel like walking. They provided us with basic breakfast and snack items which was a huge help and very much appreciated. The apartment is up two flights of stairs with no elevator so just keep that in mind if it's a problem.
The Con - the only con was the noise and the only reason I couldn't rate this 5 stars. I knew Trastevere was a popular area but I had no idea this was one of the most popular streets. People come here to party and we heard people outside as late as 4:30 AM. We were here on a weekend and it may be quieter during the week but it was very very noisy directly outside our bedroom windows until the middle of the night with people partying. If noise doesn't bother you (I sleep through everything personally but it was hard to fall asleep and didn't feel relaxing), you are coming on weeknights, or you want to stay out and party until 2 AM or later anyway then this place will be a great choice!