I've seen it multiple times. Yes it is well worth it- it has a surprise at the end that no other theme park nighttime spectacular has and is very impressive to see in person.
Does this show run every night? It says select nights on the website but like the original poster couldn't find times I couldn't find what nights it runs. We are open as to which day we go so I don't want to miss it.
The show times seem to vary night by night, starting after sundown. We found the times three places: as a park update in the app, on digital signs around the park, and on a paper at the Guest Relations office.