We have done it a few times. Remember To book in advance and ask for a table at the front. The orangutans swing down and you can get photos with them. There is also snakes that you can hold. there is also the elephant bathing and feeding you will get to do if there early enough, it's just before the breakfast starts
i went before. i can't rmbr the price. But totally not worth it at all. You need reservation to get close up with the ah mengs. Buffet spread is very simple.