While this exhibit may be one of the best at the zoo, it certainly could be better. I personally don't like primates in cages. I think they should keep them in open air exhibits.
@Dr. Wolverine I personally disagree. I think open air exhibits lack climbing and enrichment opportunities. Not everything has to be naturalistic, it just has to benefit the animals. After all, playgrounds for kids aren't modeled after the wild, but offer children a lot of stimulation.