First and foremost the apartment is gorgeous - it's huge and spacious, nicely decorated, and has an incredible outdoor area. It truly is one of the most beautiful Airbnb's I've ever stayed in, and I've stayed in a lot.
The apartment is located on a hill above the Prati neighborhood, in a quiet residential area across from the Waldorf Astoria hotel. It's a 15 minute walk up the hill to a small commercial area with coffee, groceries, pharmacy, and some shops and it's a 15 minute walk downhill into Prati and the rest of Central Rome. Be prepared to do a lot of walking uphill on your way back home from exploring, or to take cabs and Ubers, both if which are plentiful and inexpensive.
Internet and mobile service on Monte Mario (the hill the apartment is located on) can be quite spotty so be prepared, we tried a wide variety of solutions but none really worked. Hopefully this is something that will change in the future,
There is a very sweet young cat who lives outside around the building and she comes into the apartment if the doors are left open. We loved her but if you don't like cats or are allergic it can be tough to keep her out.
Nico was very easy to communicate with. If you need a lot of space/3 bedrooms then it will be very hard to find a comparable apartment for the price. It really is fantastic - just know that you won't be in Central Rome, but a short walk up the hill from it.