Fabio is a great host. He is very helpful with everything you need and has a lot of great tipps for you.
We had a bit of trouble coming to Rome (flight time got changed a few times und ultimately flight got canceled.) Fabio was easy to communicate with, answered quickly and was very helpful.
The appartment is right next to the colloseum which was great. You can explore Rome by walking easily. We walked almost everywhere. And if needed Metro and busses are really close to the appartment as well.
Monti is also a great part of the city to go out in the evening. There a lots of great restaurants and bars (we recommend Trieste Pizzeria ;-)).
The appartment was really, really clean, super cozy and a good place to stay - even when there are 40° outside (due to the AC).
We had a great time at Fabios place and can absolutely recommend staying there.