Location: Awesome!!! It is basically next to Trevi fountain. Lots of tourist walking downstairs but it is still quiet inside the apartment.
Interior: Very clean. Bed/room/bath configurations were as described. Two ACs in the bedrooms, but we wish that there is an AC in the living room/kitchen area also. Overall very good.
Communication: No response from host for couple of weeks. After that, I contacted Airbnb support, who contacted the host, and the response from the host was much better. Thank you.
Check-in: Very good. They were able to accommodate us to check-in early. And she waited for us for 30 minutes because we were late (sorry).