We loved staying in this quirky, fabulously-located apartment. We took full advantage of the foosball table. The three terraces are amazing, but it was too hot to spend any time on them. Would be amazing much of the year.
The location is excellent. You're a reasonable walk from most of the prime tourist sites...and if you rent a bike or scooter, you can reach most of Rome easily. The Jewish quarter also has loads of restaurants.
Note to Americans—the air conditioning is not as powerful as we're used to, and it's only in the bedrooms, living, and dining room (and not all at the same time); but it provides welcome relief compared to the sweaty conditions of Rome in summer.