I've stayed in a lot of AirBnb and Antonio is one of the best hosts though we've never met in person. His place is tastefully decorated with all the necessary amenities and more - we especially enjoyed the CD player! Antonio was super responsive and attentive with any questions. His guide for Florence was so comprehensive and on point that we pretty much just followed all his recommendations during our 4 days stay and had a fabulous time. He graciously allowed us a later checkout time when we needed extra time on our last day, and upon hearing that we're traveling to Rome next, he provided another comprehensive list of suggestions that are equally excellent. He really is the best host that any traveler can hope for!
The only words of caution is that the flat is the top unit (with great light!) and the stairs are quite narrow and steep. It wasn't much of a problem for us since we didn't have much luggage and it's a good way to work out all those delicious pasta and gelato but can be challenging for people with large luggage.