We stayed a week in Sept and were thrilled with our choice. The apt itself is in a great location in Trastevere. Right in the heart of it all, so many restaurants to choose from within a block. (The one right next door ended up being one of our favorites.). It's on the first floor (up only one flight of stairs). Inside the apt is beautiful-- just as pictured. The little patio was a great place to have our coffee in the morning or our wine in the evening. We had no problem with noise at all inside the apt. Do note that the kitchen is tiny-- while is it well equipped I don't see how you would have the space to prepare a meal. (But why would you? You're in Rome!). We used the kitchen for coffee!
The bathroom is tiny, but everything works. The mattress on the sofa bed isn't the best-- it could use replacing / upgrading.
We arrived earlier than check out time and we were able to arrange to leave our luggage until the apt was ready. That was a huge help to us and we appreciate it!
Overall: a great option in an amazing neighborhood. We would stay there again and we would recommend it to others.