I wish I could give 10 stars. This apartment was absolutely stunning. It was clean and beautifully furnished. It is located literally on the Trevi fountain, so you open the window and look out at the fountain and the people - but it is not at all noisy. The windows are sound proof so you don't hear the people below unless you want to.
Alessia met us promptly when we arrived, and we were in contact all day as we approached the apartment. When we checked in, she gave us a map and pointed out places and restaurants that locals love and frequent. She could not have been more accomadating and delightful.
The apartment bed was comfy, and there was nespresso there for the mornings. She left us slippers for the shower, and wine as well. I highly highly recommend staying here while you are in Rome.