Rolando has an EXCELLENT location to make the most of your trip to Firenze, very near two bus stations and also you can just walk downtown from there.
I recommend getting your bus pass for the day (which you can get at any newspaper stand or kiosk) and head for his place.
He was kind enough to allow us doing an early check in as our train arrived early in the morning.
We had a very tight schedule so we didn't have much time to get to know him but he had everything ready on our arrival: a map of the city, a tour guide and even chocolates and a couple of water bottles.
The room, towels and bathroom were very clean. Also, having you own bathroom is a very big plus.
Definitely a place worth staying.