I stayed at the Mulino one week ago, and the experience was excellent. Not only because of the wonderful location, close to the Arno river in Firenze, but because of the nice facilities, and mainly, because of the wonderful people who work at the hotel, especially Aldo and Ray. These guys are great. We were 6, two families with kids, and we know how the things can be when travelling with children, they want to play all around, and never are quite. And besides, they have a very nice Enoteca and bar. The restaurant is great as well (I would make a review especially for the restaurant, if possible).
Ray, Aldo, uno abrazo, grazie!