The apartment was clean and just like the pictures showed. It was exactly what we expected. It was a little tricky to get to with luggage since you have to walk to the Trevi Fountain crowds but other than that it was great. If you want to be in the center of it all I recommend it.
Pros:
You are literally right next to the fountain, you can hear the fountain from your window.
You are walking distance to pretty much everything.
You get to see the fountain with less people than most since you can make a quick trip to it early in the morning before the crowds arrive. We even got a picture by ourselves. There was not a single soul in sight. It was amazing!
Cons:
Since you are in such a highly touristic area, it is very loud. The crowds are loud until about midnight and then the street cleaner trucks, and trash trucks are very loud early morning. We were out late each night so the night noise didn't bother us but the early morning noise wasn't the greatest.