I already said that this is KIND OF a tourist trap. It was and it wasn't. A dam was built to hold the water back so that boats filled with tourists can flow through multiple times a day.
It is lovely, but in hindsight, I wish that I had chosen an alternative activity. Plus it is a SCHLEP to get there. The waterfalls are outstanding, but more so in Miso Ha.
If you are traveling in a smaller group, you may have to wait that enough people accoure. The boats depart only when they are ful. The minimum is 10 people.
When you plan a visit to the canyon include (just in case) some 2 hours extra waiting. We waited more than 1 hour.