My wife and I stayed at Poggio al Sole in April 2012.
I have thought long and hard about this, but I simply cannot make even one negative comment about this place. Everything about it is absolutely perfect. We had a double room in the little stone cottage. For most of our week or so there we had the place to ourselves. Peace, quiet, beautiful location, considerate, civilised, educated hosts, excellent breakfasts.
This is the place for the perfect Tuscan holiday.
The only small negative I can find is that you really must have your own transport, without your own car it can be quite difficult to get into the village (Fiesole) or to all except one of the local trattorias. I cannot recommend driving in this region for anybody who is accustomed to driving on the left hand side of the road.
This minor criticism is not any reflection on the excellence of Giovanni's accomodation:-
It doesn't get any better than this.

The farmhouse is lovely, the best breakfasts that we had in Italy (we have food restrictions, but there were so many choices, handmade and delicious, that we were well taken care of.) What really needs to be mentioned is that Giovanni, our host is a true "Renaissance Man". I joked with him that he is the modern day Leonardo. He was too modest to accept this, of course. He is an infinite source of information about the region. It took me several days of reading some of the books in the house to realize that they were written by him. Actually a total of 10 books about the Tuscany region. Most impressive to me, however, was that when my husband and I received a 110 euro fine for not understanding that the bus ticket had to be validated on the bus, Giovanni typed up an official looking letter , in duplicate, for us to present to the authorities. We brought it to the station and they eliminated our fine completely!

I try and write something unique for each place but it is hard for this place, because it is exactly what people say.. "Gorgeous, favorite place in Italy, A beautiful place to explore".. I am so glad my fiance (he proposed to me a few miles away) and I had the opportunity to come and visit. We spent 4 nights at this place. The places is a nice escape from the regular touristy things and close enough for you to get around and Giovanni (the owner) is a wealth of knowledge. The breakfast is delicious ( we posted pictures to prove you don't just get a croissant and coffee) there are eggs, fresh juice, fresh tomatoes, cereals, fresh cakes. Anyway, I love love love this place. If you have the opportunity to stay here please do, you won't great it. I am happy that we will always remember this place.

Grazie Giovanni, ricorderemo per sempre il tempo che abbiamo trascorso qui! I hope that came out okay.

I spent 5 days with my wife at this fantastic place. We fell in love with this farmhouse. Everything we read about on the web page was there and even better in reality. The view from the terrace is so panoramic. Giovanni is a very pleasant man. He is also very helpful. We recommend this place if you want to explore Tuscany. We also recommend you follow Giovanni's advices.