This apartment was perfect for 2.5 days for my family of 4 (wife, myself, 8yo, 7yo). It was in a great location right down the street from historical locations (Spanish Steps, Trevi Fountain, Pantheon), as well as the metro to get everywhere else. There are a few small convenience stores around it, a grocery store right down the street, and many restaurants and gelaterias in the area. Also, check out Lembos cafe next door...they're great people!
The inside is small, but was plenty of space for the 4 of us. It has a seating area outside with a table (great for breakfast/dinner), but also an upper level spacious terrace with an AMAZING view of the whole city. We watched the sunset out there each night, saw St. Peter's, the president's house, and even saw the presidential helicopter land there 1 day. It is on the 6th floor of the building, which requires using the small lift to get up, but was never an issue for us. 1 piece of advice is to give the front door key a shimmy when you unlock, which was a little tricky at first, but Silvio was there to help immediately!
We had an awesome stay here. Definitely book it!