That must be one of the best Airbnb locations that I have stayed at - it's truly hotel standard! The flat is in a great location, in a lively neighborhood of Trastevere. It is perfectly located for getting to all of the main sights, but at the same time you do not end up in the middle of the most touristy (read - overpriced) areas. There are lots of wonderful bars and restaurants just a few minutes on foot.
The flat itself is much better than it looks in the photos, has all the amenities that you could need, starting from a selection of various sized towels, toiletries and up to a fully equipped kitchen, including pasta! :)
Paolo was an excellent host - offering a few different ways to get to the flat (we used public transport to get from the airport and taxi to get back as our flight was early in the morning, and both options were excellent), checking in with occasional tips (where to get best tiramisu, where to go for a night out, how to get a taxi) etc. Fluent in English as well.
Now a couple of things to keep in mind. Flat is on the 5th floor with no elevator - that did not bother us at all but something to notice. There is a very lively bar next door - this will not be a problem if you close the windows but it did wake us up at night when we left the window open. But trust me, it's a good fun there! :)
So all in all we really enjoyed a stay at Paolo's apartment and would stay again if we came back to Rome - no doubt about that!