If you're traveling to Rome, I'd highly recommend staying at Maria Carla's.
The location is great! Right in the heart of Trastevere, which is undoubtedly the best neighborhood in Rome -- charming yet lively, and full of amazing shops, sights, and restaurants. And the apartment is just a few minutes' walk from Piazza Trilussa and the Ponte Sisto bridge.
The apartment itself is charming, and much more spacious than others at this price point.
I'd definitely stay here again!