I went with two other adults and no kids in our group. We all really enjoyed the different segments and the way the animals/ birds were not all enclosed/ secluded like in most zoos. Some of the animals in here were one that I had not seen before and it was a fun experience.
This is a clever use for a building built for the Olympics.
If you also plan to go to botanical gardens it would be beneficial to get the ticket bundle for additional savings.