Lucilla is a very friendly and helpful host, and she will answer all your questions promptly. She is also flexible and understanding :)
The flat is very cozy, with a really big terrace, which must be wonderful during summer (we visited in December, and still enjoyed it a little bit :)
There is a 20 minutes walking distance to the Vatican, and a non-stop supermarket (Carrefour), as well as a local fruit&veggie market not far from the flat. You can also find trattorias and pubs around the block.