It's excellent, taking about 30-40 minutes in total. It covers Taizhou's history, river culture, people, and opera culture. You can also see performances on the shore, including "The Drunken Beauty" and a performance by Mei Lanfang.
A few things to note: it gets crowded, so there may be queues. Once full, it leaves, and those who arrive later board another boat to ensure everyone gets a ride.