Marc is a great host.
Responsive clear communication makes checking in and out easy.
The place is a perfect home-away-from-home for us (a couple with a 12 year old kid):
1) Safe neighborhood
2)Very good space with a nice touchl
3)Everything operates reasonably well in the house with no major problem (washer and Aircon are key in the heat of summer in Florence so if you travel in summer you may want to make sure you pick a house with these things working)
4) Marc is very well prepared to ensure guests feel welcomed with his personal greeting; well documented information pack for the town, quick intro to the area around the house, and he even pulled out some LEGO for our kid when we checked in