We just finished a trip to Rome had a great time much of it due to our wonderful stay at this apartment.
1. Location: Perfectly located next to the Vatican with shopping and restaurants nearby. It is only a 2 minute walk to the Metro station so makes it very convenient to see other attractions or to go to the Train Station.
1a. Being is a busy area, there will be a lot of noise in the bedrooms if the windows are opened. But for the most part when we slept we had the windows closed so that wasn't a problem for us.
2. Interior of the apartment: The interior of the apartment was very clean and in great condition. It appears to have been recently renovated. What we really liked about the apartment was that each room has its own bathroom, plus an additional bathroom in the hallway. Each room was well furnished and had enough amenities for the guests, much like a hotel.
2a. The common area is a single kitchen / dining / living room and seemed to be a little small. However since we spent most of our time touring the city we had no problems with the size.
3. Building: At first the building seemed to be on the older side, but as mentioned above the interior of the apartment is well maintained. It also adds to the character and charm of the place. There will be some foot traffic through the building of maintenance doing some work but there was enough doors and locks to make us feel safe and secure.
3a. The elevator is small. It can hold at most 2 people and 2 pieces of luggage. So it did take several trips when we first arrived and departed, but that was a minor inconvenience. On most occasions we just got some much needed exercise and walked up and down the stairs.
Again this is a great place to stay and I would highly recommended it for anyone visiting Rome.