We had an unforgettable stay at Marlène's apartment! I would deem it among the top 2 most memorable of my 20-30 AirBNB stays to date. Marlène lives in a wonderful nook of Rome, both a 5-minute walk from the Colosseum but also out of the way of the hordes of tourists. The streets are dotted with restaurants and enotecas (wine bars), and just 10 minutes uphill we found ourselves wandering through Roman and medieval ruins almost entirely by ourselves - a welcome respite from the overcrowded tourist hotspots elsewhere in the city. I would go as far as to say that the neighborhood experience was the best part of our Rome trip.
Marlène herself was a wonderful host, both polyglot and bibliophile. She gave great personal attention to making us comfortable when we arrived. The apartment itself is a bit magical, with big windows overlooking the street below and floor-to-ceiling bookcases packed with books. All of the furnishings were also in very good condition. Marlène, her dog and cat all live in the apartment, so you shouldn't expect the type of AirBNB experience where you never interact with the host; however, there is also plenty of private space for guests.