We stayed at il Guelfo Bianco back in August. The rooms were lovely (very charming in a typical florentina style) and very clean. The service was always friendly and informative. The location is extremely central. Also loved the food served at their bistro (downstairs), they offer simple and delicious toscana dishes - all ingredients from their organic (bio) farm. It can get a little difficult to reach it by car, as only residents are allowed in that area. So if you are going in, please make sure that you notify the hotel ahead of time, so that they can make the necessary arrangements and help you prevent a juicy fine!