I had an absolutely delightful stay at Olivia's charming flat. It looks just as lovely in real life as it does in the photos. The location is fantastic. You're right in the center of things (both in Trastevere and Rome), but also on a quiet side street with very little in the way of noise.
Olivia was a great communicator throughout the process. She provided proactive and clear instructions, while also noting that she was available to chat should the need arise. (It didn't during my stay.)
I'd absolutely stay in Olivia's flat for my next trip to Rome, and you should do so too!