Sam's place is beautiful property! Sam and his staff are very responsive, pleasant and accommodating. They all offer helpful knowledge on the area, Rome's attractions and public transportation. They even arranged for a private car to and from the airport which truly helped take away some of the stress for first time visitors of Rome.
The location of the apartment is not far from Vatican City, but I will say that the apartment is a bit set back and off the beaten path, so be prepared to walk. There is access to the bus nearby and the Metro train about 800 meters (1/2 mile) away.
The apartment gave us an authentic Italian/European feel which is what we really wanted and allowed us to feel at home from the first night. The beds are amazingly comfortable and bedroom setting was more than accommodating for our stay.
Heads up... While the apartment has all updated furnishings and decor, the shower is REALLY small.
Overall, this was a lovely place and would recommend it to future travelers.