We loved our stay at the apartment! It is a great place in a lovely location and check in ran very smoothly- Celeste was very flexible about the check in time and had left a useful guide to the area and Rome itself.
Trastevere is a gorgeous little area full of bars and restaurants but not too noisy. We loved the nearby Grazia and Graziella, and Gino 51 to eat, and the nearby wine bar VinAllegro for wine and snacks. The only thing we would say about staying in Trastevere is think about transport, as it is over 30 mins walk to the centre and sometimes we were relying on buses that were cancelled or slow so get to the centre as there is no metro.
All in all, we had a wonderful stay and would definitely recommend this to anybody visiting Rome!