I admit it. I was prepared to not be impressed, but I was and I really enjoyed it. It's expensive and honestly I can't see spending more than one hour maybe two. The 3D movie is wonderful. The atrium is lovely, so many butterflies flying around, landing on you. I felt like I was in another country. While my kids liked it, we discovered my 3 y/o is terrified of butterflies, hehe.
Definitely go first thing in the morning: less crowded and not as hot. Like someone mentioned, it's a place to go at least once.