While I have some reservations about "professional" AirBnB places and the impact they have on housing availability and affordability, this place is very well run. Communication was very good and friendly, and the apartment was very nice, clean, and well-stocked. Bright and airy with beautiful, high ceilings + ceiling fans (I forget if there was AC, but this would probably be relatively cool on a hot summer night). I really appreciated the provision of local maps and guidebooks. Great location walking distance from main train station and in a cool neighborhood (Monti bars and restaurants are close by, also walkable to other hip 'hoods like San Lorenzo and to major sights like the Coliseum).
FYI, it's a third-floor walk-up, so keep that it mind if you have mobility issues or need to carry lots of stuff up the stairs.