My wife and I stayed at Julian and Annas place for 6 nights end April, and enjoyed it very much due to the beautiful hills with olive trees and vines, the Roe deers every morning and Julian and Anna who are very kind and helpful hosts that loved to tell us about the area. The "flat" is a charming rural place that has still an old athmosphere though modernized with all we needed incl. a well equipped kitchen.
If you want to stay in the countryside, though close to Florence, with grand views and nice hosts this is the place