We had a great stay at Dario's place. It's very near the bus stop and it's just a few stops then to the Metro, which brings you to the main tourist sights. We found the transport system very easy to follow, if a bit crowded.
Dario's apartment is very well equipped, it's got all the amenities you are likely to need for a short stay in Rome and there's a big supermarket on the ground floor of the apartment, which makes shopping very handy. Also, cafes and bars within a few minutes walk.
Dario is a great host and was very quick to reply to any messages. It was invaluable to have to contact, if necessary. Also, the house manual had very easy-to-follow instructions on working the A/C unit, wall safe, etc., and we would highly recommend this apartment