If you're near Guangzhou, it's definitely worth a visit, but if you're traveling all the way there, it's definitely not worth it. There weren't many animals to see, and the large herds you see online were practically nonexistent. It was pretty much like a regular zoo. You can see some wild animals on the train, but they're all pretty common. The cable car ride offered little variety.
We did see some pandas, though. The 4D movie had a 40-minute wait, which was okay. We mostly walked with our kids, and finally got to ride the train and the bee-shaped ride in the cool and cool park.
That's pretty much it. Despite its reputation, it doesn't live up to its reputation.