This was an interesting tour. I really enjoyed exploring these islands. If you have a few days in Venice and are looking for something to do. I would recommend it. The downside is the size of the group. We had to compete with a whole boat full of people to see the craftsman. There was no effort made to stagger the group, so that everyone could see and hear.
I would highly recommend a day tour of Venice. It was nice to see and hear the commentary of our guide. The group size was acceptable. However we were rushed through St. Marcs. It is unfortunate. It was our favorite part of Venice.