This is possibly the best experience I’ve had with Airbnb. The flat was perfect for two and it felt like home for 4 nights in Rome; it's stylish, it was recently renovated and has been well looked after. It gives on an internal yard so it’s quiet, and it stayed fresh despite the hot weather which was great (but there’s also aircon in the bedroom if needed). The bed was very comfortable, all commodities were provided (lovely to have a fridge full of water bottles). The bathroom is not huge but that was not a problem for us and the shower worked perfectly with good water pressure which is the most important. It was really easy to communicate with Antonella, she’s a very considerate host.
I highly recommend staying in Testaccio; it’s a bit away from the city center hence less touristy, perfect to enjoy local life and it’s a heaven for foodies with great restaurants. It’s easy to walk to Trastevere or even to the center (about 30 min walk), and there’s good transports.