Location. Location. Location.
Yes, the apartment is great. Yes, the amenities are great. Yes, it is a great value. But above all of those things this location is where you want to be. This is the best place to stay in Rome - you are close to all the sites you want to see, but also close to the best set of restaurants and shops in town. When we got in our taxi to take us there, his comment was "oh, great restaurants!" and he wasn't wrong. Right outside your door is amazing pizza and gelato with a crazy amount of restaurants and bars to keep you entertained and fed. There is a market right there for nights you want to stay in. Everything you need, all within a few steps. After you walk all over Rome seeing all the sights, and sit down for a good meal, the best thing in the world is to be a few blocks from Navona and a few steps from your own bed.
Lest I neglect this fact, let me make this clear too - Stefania is a fantastic host! Quick replies. Helpful insights. When my luggage was delayed and I needed some help to stay in contact with the baggage handlers without having a local number, she stepped up and went out of her way to help me. Amazing!
We could not have enjoyed our trip more than we did. Yes, that is largely because Rome is an amazing city, but Stefania and this apartment were a huge part of it. I wish I could give her a 6th star!