A very nice cosy apartment, right next to the Vatican. Everything was as pictured and actually nicer in person. Exceptionally clean! My only warning is, be very careful in the bathroom, the shower and floor become extremely slippery when wet...in fact my friend actually slipped while getting out of the shower, fell, and ended up with a nasty bloody gash on the side of her head!
The area seemed very safe, in fact there is a police station just at the end of the ally to the left, and there are bus stops along the main street, steps from the apartment. The best & cheapest way to get around Rome to see the sights is by bus (lines 916, 87, 64). Looking at a map of the city, you would think everything is so spread out, but actually everything is closer then you might think. Just be prepared to walk, A LOT during your stay!!! The metro is also another cheap way to get around, however, the closest metro station is Ottaviano and is a long distance to walk from the apartment, but it's easy to find and quite do able, if you would rather travel by metro instead of by bus. Once inside St. Peter's Square, you have to cut directly across to get to the street the metro is on and just keep walking straight til you get to the station, it will be on your right hand side.
The BEST restaurant closest to the apartment (just across the main street to the left) was Papa Rex. I wish we had found this restaurant our first night and not the last, cause this would have been the ONLY restaurant I would have eaten at the whole trip (yes, it was that good!!!) It received a TripAdvisor award 2017.
Changing currency: I recommend getting just enough money changed to euros at the airport to get to the apartment, and then changing the rest of your money at the bank next to the apartment. Commission to change money is a killer!!! 
Finally, the host, Emidio was very helpful. He and his mother were at the apartment when we arrived and they gave us a tour of the neighborhood. There is a bank, a little health supply store (laundry soap, sanitary napkins, hair color, etc.), market, post office. Emidio was kind enough to arrange our airport transfers for us and communication was always very good. I must have sent him 20 messages with questions about how to get around and what he recommends, while we were there, all of which he answered. Such a nice patient man!!! 
I would definitely stay here again, the next time I visit Rome, and would recommend it to everyone!!!