We found Lorenzo's place at the last minute after having a different Airbnb cancelling last minute - they were really accommodating about fitting us in at short notice and responded quickly to all messages.
The apartment itself is lovely, a really good size for us (family of 4), has everything you'd need, really clean and well decorated. We felt right at home. The area around Trastevere is great, really close to lots of nice restaurants, shops etc and by the piazza, and a short cab ride from all the main attractions (or walk if you're feeling energetic!). The only down side of the location is that because it is near some late night bars it can be quite noisy at night. Earplugs were provided for all the guests though.
Overall we wouldn't hesitate to recommend this fab apartment to anyone travelling to Rome.