It has that full canopy you often mention as giving the apes a sense of security. Unfortunately just based off my experiences: Otana hasn't been great for the troop from a purely public interest point of view. What was once a large boisterous troop is now a small, subdued and shy one. The best glass viewing area is permanently closed off due to his dislike of the public being so close. I really wish they'd modified the old ape grottoes into a 2nd gorilla exhibit rather than create the mediocre lemur walk-through. Gorillas were always Melbournes star attraction and two troops rotating exhibits would have been revitalised interest.