Right in the heart of Trastevere, you couldn't ask for a more prime location than this.
Great space for 1-3 people. It was a bit smaller than I expected, but if you're doing Rome right, you shouldn't be lounging all day in your accommodation. Our host Claudio greeted us and allowed us to drop our bags 5-6 hours before check-in.
It is mostly quiet through the day, but if people below are sitting at a table talking loudly, you can hear the conversations but it is not much of a concern or bother as the windows do a good job keeping noise out. However the hallway stairs can get a bit rowdy as the front door does not keep much sound out and I was woke up to mostly Americans yelling or checking out very early in the morning. This says nothing about the flat but more so about inconsiderate people.
Other than that, we enjoyed our stay. If you come to Trastevere, stay with Claudio and eat at Pasta e Vino and look out for a waiter named Georgie, he will take care of you.