Our stay in Trastevere was excellent. The room was small but nice, with everything we needed on our 3-day stay. The bed was comfortable, the room was stylish, and the TV enabled ChromeCast which allowed us to stream our own shows.
The neighborhood was INCREDIBLE. The unit is a couple blocks from the pedestrian bridge that crosses the Tiber River and is a 10 minute walk from the Circus Maximus subway station. The neighborhood is literally filled with restaurants and bars, we had so many good meals. There is a small place for breakfast 20 steps from the front door. The neighborhood was busy late into the night but the unit is on a side street so we never felt like it was too loud. The neighborhood directly across the Tiber River is the Jewish District, there were many excellent restaurants there also.
The ancient sites in Rome are nearby, but not close. We highly recommend using the Lime scooters that are found everywhere. We could get to the Colosseum within 10 minutes.