The space is roomy and well equipped. It’s perfectly located for walking all over Florence. Lastly, your host is knowledgeable and quick to respond, so reach out if any questions arise!
One small note, AirBnB requires local taxes to be listed within the original listing. If he does not mention them there remind him to take up his tax needs with AirBnB, not you. You should not be paying them, unless properly notified prior to booking.