This is a fantastic house for a long stay with a big group. The occasion was a milestone birthday for me, and we hosted a rotating crew, totaling about 30 over the course of a month, very pleasantly. The beds are comfortable, the bathrooms ample, and there's generally plenty of room. The garden is lovely; we ate outside most evenings when we ate in.
It's easy to get into Florence by taxi, bus or house car service. It's also great as a base for day trips to the coast, wine country, Bologna, etc.
The three brothers who own the place are easy-going and very responsive. They had good restaurant recommendations, day trip recommendations and, when unfortunately I needed it, medical clinic recommendations.
It is an extremely good value.
Nothing is perfect:
As with all vacation rentals I've ever signed up for, the kitchen is poorly laid out and poorly equipped. It will frustrate you if you plan to do much cooking, which you will want to, because the available ingredients are so fabulous.
ASK about housecleaning plans: there is none unless you ask, which seemed odd for a month-long stay, and then you have to specify what services you want. A really thorough cleaning never occurred. Someone more assertive than me about this probably wouldn't have this problem, however.
But those are minor quibbles. It's a great place, with great hosts at a great price.