Luisa's apartment is in a great location for someone settling into Roma (or Italia overall) and interested in having someone point them toward resources. The location in Travestere is unbeatable, especially if you don't mind and/or enjoy walking. Do note that this is like living above a street full of bars and restaurants in New York City - there will be a lot of nightlife noise until quite late at night/in the morning, as Romans eat late and drink late! Also note that Luisa has a cat but it does not go into the rental rooms. That said, this does mean there is a very limited amount of cat dander around, even though Luisa keeps a very clean home and I saw her clean before each new guest checked in (I am allergic and only felt it a *tiny* bit).
Also keep in mind the apartment is a very small 2 bedroom and she sometimes also rents the second (what must be her own) bedroom, so you may have at least 4 people (including yourself, and including her high-school aged son) sharing the small apartment and single small bathroom.
I stayed at Luisa's for 5 nights and think 2-3 is a more ideal sweet spot, given that the space isn't too large and there is a lot of other incoming and outgoing traffic if she is renting both rooms. Luisa herself was very thoughtful about suggesting places to check out and making sure her guests were aware of timely activities that tourists might not otherwise find out about. She also was kind and flexible about letting people store baggage and check out, and in, at various times, which I appreciated.