The apartment is just stunning. I had the best time here. The metro is 5 min away and brings you to the most important spots. To the Colosseum you can walk withing 15 min.
The apartment is huge and it's an BNB not an shared apartment. I didn't know in advance so I felt even luckier ;)
I can highly recommend to stay with Marina and her husband. They provide a really good breakfast and make it an extraordinary check in. They even picked me up from the train and Marina gave me a really good introduction to everything that's important. When I come back I'm gonna stay here again... :))