It totally depends on the person, but going through with a walking tour guide was almost information overload for my husband and I. it also took 2 hours, instead of a 45 min. walk through for such a small museum. They were showing two films, but we didn't have time to watch them after our long tour. we did learn a lot and thought it made more 'sense' and tied together to go there at the end of our trip.
Pros: helps tie together all the things you learn while on Kauai
Cons: tours are very long