The staff is incredibly friendly.
The facilities are complete, even with a feeder bus right down to the parking lot.
The animals are well-groomed, clean, and their fur is well-maintained.
The rides are so complete that one day isn't enough.
The only downside is that the online ticket exchange is a long way off if you want to ride the Drive-Thru Zoo. Thankfully, there's a feeder bus.
It should be possible to exchange online tickets in the Horse Riding/Drive-Thru area without having to go downstairs, as ticket purchases are only made upstairs.