This is by far my favorite AirBnB in Italy. The location is unbeatable. It's one thing to go see Trevi Foundation. It's entirely different to walk past it multiple times a day and sit by it before breakfast and after dinner.
The apartment is completely updated and artfully designed and decorated. It's well stocked with everything from scissors to hair dryers. It doesn't have a washing machine, but there is a fantastic Laundromat located 200m from the door that was easy and inexpensive. It said self serve, but they washed, dried, and folded everything for us for 10€.
The host is lightening fast to respond to inquiries. Our only regret is that we didn't book more time at this location.