Her place was centrally located in the historical city center of Rome and it became the most important thing during our stay, since (unlike other capital cities like Paris) Rome does not have an underground metro system. So, the only way of getting around was my foot or taxi, but we were on a budget so we couldn't use the taxi all the time. Gaia's place was so central and walking to the Vatican, Trevi Fountain and Pantheon (for example) was so easy and convenient. It was about 5-10 min walk to each of the places.
Besides location, the flat itself was so well furnished, clean and spacious. I didn't expect such a large apartment when I was booking, but it was still quite comfortable for 3 people. We found that there was an AC for each room (2 bedrooms and living room), which were very handy in the summer, and Gaia has also a Wifi extension to one of the rooms where it didn't reach. For these reasons, I found her place to be extremely comfortable.
Gaia herself was super helpful, kind and knowledgable on her flat (of course!) and about Rome. Before she left, she showed us a map of Rome, outlined where the flat was and showed us where are the best neighbourhoods and sightseeing places. Thanks to her we've had the best stay in Rome as locals :)