The location and hospitality (from manager Paolo) is excellent. It is right across the street from the walls of the Vatican. A brisk 5 minute walk to the door of the Vatican Museum, and another 5 minutes to St. Peter's square.
Inside is exactly as depicted in the listing. The building has a secure entrance, and the unit itself has very secure windows and door. It isn't fancy inside but it was exactly what we wanted (a place to sleep and regroup) and was exactly as Martina described it.
Paolo met us at where the taxi stopped to drop us off, and walked us in and showed us around the unit. He made himself available to us for follow up (we didn't take him up on that) and contacted us mid-stay to check to see if we needed anything (we didn't).
Martina arranged for a very convenient taxi from the airport. She suggested it and we accepted, and still agree that it is a very good way to go if you are unfamiliar with the train and bus system in Rome. Now that we know what we're doing, we know that we can get to and from the airport more inexpensively but as newbies we were grateful for the great service from the taxi company. There is a bus stop very close to the building, and the closest metro stop (Cipro) is less than a 10 minute walk away.
I wholeheartedly recommend this apartment for the budget-minded traveler.