We had a wonderful time in Trastevere. The apartment was just as advertised, and Ludovico was a very attentive host. She arranged transportation from the airport on our arrival, and back to the airport on our departure, which was a great convenience.
The neighborhood is very lively in the evenings. You can easily walk to a hundred different restaurants. Each night there was a singer/guitarist in Piazza Trilussa, right around the corner, and always something going on in Piazza Santa Maria, a short walk. (Don't miss the interior of Santa Maria church, it's magnificent, and free) We walked to the Colosseum and Forum, and to the Pantheon, Castel Sant'Angelo, and the Vatican Museums, Sistine Chapel and St. Peter's, and Piazza Navona.
Of course, with all the local nightlife, it is pretty noisy at night. We brought earplugs, and used them, and we slept well. Also, the bed is really comfortable, I wish we had the same one at home! And everything that we used in the apartment worked.