We had a really great time in Rome while staying at Miguel's AirBnb. It has a great location: right near the Vatican, but still in a quiet street, with a lot of lovely restaurants (we enjoyed the ones Miguel recommended "La Vittoria" and "Cresci". There is a bus stop down the street, you can take a bus to Termini from there. The city center is in a walking distance.
The room has an air conditioner, which is really great, it was tidy and comfy. The pictures of the rooms on the site are accurate.
All in all it was a very nice stay and Miguel is a very kind host!