Apartment was as described, traditional, clean, comfortable and quiet. The top floor location gives great views across to the Vatican and St Peter's Basillica and access to the private roof terrace improves this further. There is a lift in the building if you're not a fan of the stairs. Inside there is plenty of room for two and with the sofa bed you could accommodate four without feeling cramped. The bedroom is quite and very comfortable with plenty of storage space. The kitchen and equipment is fine and a couple of local supermarkets make self-catering a realistic option.
Comms with Simone and colleagues were great - both very helpful and friendly. We had some phone problems arriving and they were great in helping us arrange arrival and key pickup via the Air B&B app.
If we had to give one slight negative, its that the location isn't great for exploring central Rome if you don't like walking. For visiting the Vatican it is absolutely perfect!
We had a great few days in Rome and can happily recommend this apartment!