Walter is a great host and his apartment is a wonderful historic gem in a fantastic location. Walter gave us some great tips on where to go and wonderful places to eat. He also took time to tell us some fascinating history of the area. You need to stay at least 3 days to take advantage of the Firenze Card - but we only had two days so we used his guidebooks with detailed walks to see as much as we could. I would stay much, much longer next time...