We had a great stay in this lovely guest house! Both Domenico and Mario were very helpful, and the kitchen and garden were so charming. The bedroom was very spacious and clean, and the bed was insanely comfortable. It was quite hot during our time in Florence but they provided us with a fan that worked well. If you're sensitive to loud street noise it might be uncomfortable in the summer when your windows are open. There's a great supermarket a block away with good, inexpensive food. Mario recommended a great restaurant around the corner too, great food and great prices.
The walk to town isn't too far, but in the hot summer weather the bus is more appealing. The bus stop is very close to the building.
There's an extra city tax. It's in the fine print of the ad, but know its 2 euros more per person per night than your total on airbnb. Not a big deal, but I'd forgotten that bit.
Enjoy your stay with these lovely gents!