What can I say? Lamberto is the perfect host. The house is clean, REALLY clean. There is a lovely cat, but you won't see a single cat hair anywhere. The room was perfect, the bed was comfortable, and the view from the window was lovely: Florence's rooftops, really nice. The bathroom was very clean too, with a big shower.
Lamberto suggested me a lot places to go to, places to eat (trust his suggestions, worth it), things to do; he's a great guide to the town, and also gave me a handy useful map.
The house is not in the city centre, but 10 minutes away from it, far from the crowd. You can easily reach it on foot, or via public transportation, or by car. The area is lovely and quiet.
If you have to choose a place to stay in Florence, choose Lamberto's house. You won't be disappointed.