The area: The area is fantastic. Very lively and filled with little restaurants and shops within walking distance. You're a 7-10€ uber/taxi ride from Spanish Steps and Trevi Fountain. Walking distance from Roman Forum.
The host. Walter was friendly and responsive. We had a very late arrival and be was there to greet us and give us details about the apt and area. He also was kind enough to allow us to stay a bit longer than checkout time (since he didn't have a guest checking in) because we also had a late flight out of Rome. I was traveling with my mom and she has some issues with her knees so it was a relief to not have to walk around all day with our luggage. Thanks to Walter!
The apartment: it was clean and spacious. The bedrooms were also large and it was nice to have more than one bathroom. I highly recommend staying at Walters apartment.