I hope this is a fair review. The place is fantastically located in the heart of Trastevere. We felt safe walking around at night, and the neighbourhood is alive 24h.
The flat is very spacious, and the rooms are big. Although, it is an old and bit outdated place.
The kitchen had no knives.
We had an issue with the flight and arrived past the 20h, the ad said they would charge 20 euros extra, but we ended up having to pay 30 euros because it was past 23h (this was not in the ad).
When we got there, one of the beds had no pillow and no toilet paper. The issue was not solved on the first day, so we ended up buying toilet paper. Stefano was very apologetic, and it was a minor issue. The toilet was also a bit dirty.
Overall a good stay, although with some issues and communications problem.