I had a great time looking around Hershey's Chocolate world but have to agree with many of the comments. As a British visitor I had high expectations as the Cadbury Factory in Birmingham, UK is amazing and huge! You tour the factory and get free samples. Unfortunately, it felt like here at Hershey's there was just a lot of queing, a ride and then a big shop (not a problem as such, just expected more! Also, most of the good stuff to do involved an extra cost such as the make your own Hershey bar ($15) or the chocolate tasting adventure which was $10. I'd say ok for a quick trip but you cannot spend a day here unless you're willing to spend extra!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.