The apartment is tiny (and I say this as a New Yorker), but you're not in Rome to sit in your room! It's easy to communicate with Fiorenza and she is very gracious with the check-in/check-out times when possible, depending on other reservations arriving/leaving.
You're a literal two-minute walk from some of the best and most affordable restaurants in Rome in the Trastevere neighborhood. This is a dream for anyone who wants to sit in the open air, drink wine and eat good pasta all evening.
It also puts you within a leisurely walk's distance from Vatican City, and 30 minutes walking to the Altare Della Patria and the Roman Forum.
NOTA: Fiorenza did not mention that there was scaffolding blocking most of the patio of the apartment, and loud construction that began around 7am and continued through the afternoon. If you're staying within the next few months, be aware of this.