First of all, Mario is an incredibly nice and attentive host.
The apartment was a dream. The small space was optimally used, tastefully decorated and the terrace was the highlight.
Trastevere is just a great neighborhood to stay in as there is a lot going on in the evenings. Mario also gave us a list of recommendations for restaurants. We tried a few of these and were never disappointed. The apartment was so close to the Ponte Sisto that it was really quick to get to the center and all the sights.
We had great days and nights in Rome. The apartment is really recommended!