Went on this tour on a team building function with work. The other 3 reviewers did a really good job of summing it up so I don't know if I can add much more.
I would agree with the other review that said if you are a tourist to do this early in your vacation because it does give you an idea of how you want to explore this city. While on the tour there were a couple of interesting facts about the city that I wasn't aware of.
The 1.5 hour tour is a decent value for $33. I would think it covers a lot of what this city has to offer, and I'm sure there could always be more to talk about, but the line has to be drawn somewhere.
The bus drives by Ontario Place and the CNE before going in its water portion of the tour. There isn't a whole lot to see in the water portion as it just drives around the Ontario Place grounds and not into the Toronto Harbour.
This would be a delight for young kids while offering some interesting info to the parents to help plan out their exploration of the city.