Upside: The apartment was clean and beautiful like the pictures and Sara was super nice and responsive. Very good value for money.
Downside: I think Trastevere is the best neighborhood, but the apartment is 10-15 minutes walk from the center... There is a tram stop really near the apartment which is good for going to the city center, but I think that if we would have stayed in the center of Trastevere we would have walked and didn't need the Tram. Also, We needed to pay extra 20 Euros for checking in after 8pm...