We stayed at Andrea's place over the Christmas holiday for 5 days. Andrea was so helpful, he and his daughter gave excellent food suggestions all within a few hundred meters and we're even kind enough to print out our Vatican tickets for us since we forgot them.
This tastefully decorated house itself is situated perfectly. It is just 2-3 metro stops from the Vatican and 5 or so from all the tourist attractions (Spanish steps, Roman Forum, Coliseum,etc). This is excellent since it takes very little time to get where you want but you can experience Rome without all the headache from tourists.
This home was especially good for the holidays since the majority of restaurants, public transit and commerce is closed on the 25th and 26th we were able to gather groceries at Carrefour (which is only across the street) and cook at home our holiday feast. The kitchen was more than adequate for all of our needs.
The rooms were also quite spacious with a large dresser to help you really feel at home. The two bathrooms were also very nice to have since we were 4 people. Even equipped with a clothes washer!
The only complaint (very minor as it may be) we had was that the road facing bedroom would hear the occasional large diesel vehicle passing by. If you're a sound sleeper or sleep with a fan on this is not a problem and only audible in the second bedroom.
I would most certainly stay here again next time in Rome! Gear host, great apartment and in a great location!