we stayed at Rome for 4 days, and were very happy with this place. The location is perfect - a small and quiet neighbourhood right beside the colosseum. the metro station is 5 min walk, so it's very easy to start your day from there. in the evening ,the area surrounding is full of restaurants of all kinds, so you don't have to wander far. also, we used a shuttle from Termini (instead of the train), and were dropped off right next to place, so it was very convenient.
the apartment has everything you need, its clean and beautiful. Giancarlo was very nice and helpful, and answered very quickly for any question we had. Highly recommended!