We enjoyed the walking tour very much. Our guide was entertaining along with being very informed. We would recommend taking this walking tour at the beginning of your stay to understand Venice better. We saved this for our final day. The other suggestion would be to have a smaller group; there were about fifteen to twenty people in ours, and that seemed like too many. Maybe having two tours, for example one at eight and one at nine. It would have been more fun if it was darker out.