While my friend and I did not meet Roberto, Sabrina his friend who checked us in was lovely. The apartment was beautifully decorated, clean, and having a porch was especially nice. The kitchen had everything we needed to cook some of our meals. Also air conditioning was a life set in the 95 degree Fahrenheit heat.
The number 1 bus made the apartment very accessible during the day (about 10 mins by bus to plaza San Marco and then 10 to piazza del duomo for reference) but if you plan to be in florence late, be wary of when the buses run because they are less frequent at night or plan to take a cab back.
Overall, thanks for a great stay Roberto !