We had a lovely stay in this apartment and would highly recommend it.
It's great for a couple, with a peekaboo shower and a jacuzzi (which we unfortunately didn't use because it was way too hot this summer!). It was clean, spacious, well-located, and had enough kitchen amenities for us to make our own apero hour. We rented a Vespa and it was safe and easy to park outside the building.
Trastevere is definitely a lively neighborhood and we had fun exploring. There are also a large group of "study abroad" kids who hang out on the staircase outside the building, so it's pretty noisy, but wasn't unreasonable.
In the heat, we had some difficulty with the A/C being able to cool down the whole apartment, but Andreas was very helpful in resolving this quickly by getting a fan for us.