AirBnBs are at their best when they're exactly like this: a unique little place that reflects the spirit of the area you're visiting - in this case a meticulously decorated little Italian apartment, with high wooden ceilings, big windows with those classic European wood shutters you can swing open in the morning, countless books, little porcelain cups, art on the walls, and just... a magical old-timey Italian feel overall.
The photos don't do it justice: despite all the antique decor, it doesn't feel so gloomy, and while it's not huge, it's more than enough for a couple - about 60 sqm, with a separate bedroom and living room(/kitchen) connected by a hallway - and feels really spacious thanks to the high ceilings.
Even better, this is all done without sacrificing any of the modern comforts. The shower never ran out of hot water, and the AC takes a little bit to get going, but very quickly gets the bedroom to whatever temperature you want, and the rest of the apartment comfortably cooled.
The apartment is stocked with everything you could need to live there for an extended period of time, including a washing machine and a fully-stocked kitchen with a fridge, microwave, stovetop (no oven), dishwasher, toaster... Even had all the nice-to-have utilities like a hair dryer, coffee maker, wine opener, ironing board, portable WiFi (guess in retrospect we didn't need that local SIM), etc etc etc.
On top of all that, the host is super friendly and remarkably responsive. He replied to every query within minutes, and when we first checked in, gave us a detailed tour of the apartment which felt really welcoming.
Perhaps most importantly, the location is about as good as it gets. Our friend who grew up in Rome said it's one of her top 2 favorite streets in the city, and now that we've seen it, that's no surprise; the street is filled with a uniquely Roman/old European kinda vibe - old colorful and vine-covered buildings and countless cobblestone-lined alleys branching off. There's a bunch of restaurants, gelaterias, and pizza places and cool little stores of all kinds right on the street, and the area - next to Piazza Navona - is lively and fun even quite late at night (but without any noise that ever got the apartment).
It's also a short walk away from the very heart of the city, with the Pantheon, Fontana di Trevi, the Vatican, Campo de Fiori, and Via del Corso all within 10-15 minutes away (maybe 30 to the Colosseum).
All in all, we're likely to visit again the next time we're around, and would definitely recommend this place to any couple or individual visiting Rome.