Definitely worth a visit! During the day, you can enter the park and play games with the NPCs to earn silver coins to exchange for small gifts and participate in auctions. Games include drumming, rock-paper-scissors, "3, 2, 1, look this way," and push-ups, etc. At night, the lights are incredibly photogenic. Be sure to check the show times and durations to avoid running back and forth. The fire-pot and water-based fire-pot shows, iron flower displays, and drone shows are fantastic; arrive early to secure a good spot.
If you're staying at a hotel within the scenic area, be sure to inquire about the check-out time. I didn't stay at a hotel within the scenic area, but I heard that check-out is at 7 AM the next morning!