Once you get over the fear of squishing one of the many butterflies inside, you'll have a great time just watching the butterflies and relaxing. If you're lucky, one may just land on you. I didn't really hangout with the worker in the dome, but I overheard their conversations with other guests, and they sounded quite knowledgeable. I visited while students were granted free access. Once your done inside of the dome, you can go to the observation window inside of the museum and watch some of the butterflies/moths emerge from their cocoons.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.