This is a lovely place to stay in Rome, especially if you are planning to visit attractions in Vatican. It's about 15min walking distance to Piazza San Pietro where is the entrance to St. Peter's Basilica. The entrance of Vatican museum might be even closer. Otherwise, the closest metro station is about 5-6min walking distance, and several bus stations around.
The apartment self is very comfortable. Quiet, clean, spacious, having a well equipped kitchen and an efficient central air conditioning for summer stay. As long as bringing your full set of toiletries not being an issue, here is definitely a place to consider :)
Communication with Tiziano is also easy and informative, he gave us quite some recommendations of restaurant. It was a pleasant stay!