The apartment is perfectly located for seeing Rome, a 5 minute walk to the Vatican and a couple of streets away from a metro stop from which you can get everywhere you need. Also a 15 bus ride to the Stadio Olimpico with the bus departing a couple of streets from the apartment.
The local area is pleasant and quiet at night but with numerous good restaurants within a 5/10 minute walk. It takes about 10 minutes on the Metro to get to the heart of all the standard tourist spots and its actually very nice to be away from the main tourist hotspots in the evening when you want to relax.
All communication with the hosts was easy and I always received an instant reply. On the day of check-in we were running 45 minutes late but Gianni waited for us and gave some very helpful advice to help plan our trip.
The apartment is small but perfectly fine for 2 people to share, the kitchen area is also small but, again, perfectly fine to make some simple meals for 2 people. My only criticism of the apartment is that there is quite a small hot water tank which only just allows for 2 people to take a shower. We both washed our hair on the second day and the water was ice cold by the end of the second person's shower. The tank fills up again within about 30 minutes though so it's not a massive inconvenience.
If I return to Rome again I would certainly want to stay here again.