Because the apartment is in the old part of Rome, the building is old, but well maintained. An elevator is provided, but it holds 2 or 3 thin people, with 2 manual doors to close - an adventure on its own. Since the apartment is on the top floor, with many steps to walk, we got used to taking it in 2 rounds since we were 6 people, and we couldn't fit. Also note that the apartment has a sign that tells you to lock it from inside. However, the first time we went out, we forgot to remove the key from the inside key hole, and we could not get back in. Do not leave your keys inside! Apparently people do it often (there is another sign warning that locksmiths are expensive). Luckily we were able to push the keys out of the keyhole from outside and were able to get back in with the second set of keys provided. Although these are minimum details that do not necessarily reflect on the apartment itself, it is important for visitors to know what to expect.
The apartment was very modern, clean, well maintained, and in an excellent location, close to eating places. We were an extended family of 4 adults and 2 children, and we were very comfortable in its ample space. The apartment is on the top floor of an old building, and it was very quiet. We were met at the apartment, by a very pleasant lady, who spoke excellent English. We were given a map of the city, another bigger one is posted in the apartment, and were explained very well where points of interest were including the supermarket, which are small compared to US. We walked everywhere, except to the Vatican which we reached by metro. The metro station is within 7 walking minutes. We also had to leave early in the morning to take the train at the termini (before tourists and most businesses opened), and we had no problems walking to the metro station with our carry on luggage. I would highly recommend to stay here.