We stayed at the Il Guelfo Bianco for three nights. The hotel is in a great location to see the top sights in Florence and just outside the super busy, crowded parts. We arrived via train and its an easy walk from the station. The Duomo is just down the street and the local markets are only around the corner. The front desk staff were very friendly and helpful, showing us close by attractions on a map as soon as we arrived.
The hotel itself is old but our room was clean. We stayed on the top floor and had to maneuver a tight staircase from where the elevator drops you off. The room had three large windows with a great view of the Florence skyline.
While the room itself is old the bathroom is updated and spotless. We had lunch at the restaurant on the main floor and the prices were great.
In the morning the complimentary breakfast has tons of options and staff work quickly to serve you coffee and clear tables. When we booked our room we also had them reserve us museum tickets to see the statue of David and were we ever glad. The line to the museum was huge and if we hadn't planned ahead we would have ended up leaving.
Over all I would recommend this hotel for location and service.