We had a great stay at Guglielmo's flat. The location is superb, right in the center of Florence, next to most things you would want to visit. Guglielmo himself was a kind host, giving a thorough tour of the flat, and giving great recommendations for local restaurants. At the end of our stay, he let us leave our luggage in the flat for a few hours after our checkout time, allowing us another full day in Florence. Definitely recommend!