This apartment is an absolute gem!
We chose the apartment due to the roof terrace and were not disappointed. It was lovely to be able to have breakfast up there and relax in the evenings when we weren't going out.
The apartment is clean, well-equipped, and is as shown in the pictures.
The location is excellent - It is about 5 minutes walk from the Vatican and less to Castel Sant'Angelo - and feels very safe when wandering around late at night. There are a couple of shops nearby on the main road where you can pick up groceries if you intend to self-cater, we also found several really good places to eat within a short walking distance.
Massimo was really friendly and helpful when we met him on the first night and clearly explained everything we needed to know about the apartment. Half-way through our holiday we had a minor crisis which solved itself (nothing to do with the apartment) and, while we didn't need to contact him, it was reassuring to know that there was someone that we could speak to for advice had we needed to.