All of it!! The people there are wonderful, the animals are cared for deeply (and even a bit spoiled, though they deserve it!), and it provides a wide variety of skills to have under your toolbelt for any future endeavors. I'd love to go back again someday.
What I wish was different
I wish I had gotten more experience out with the animals -- most of my work was in the nutrition center, and while I loved the moments with the animals I got, I wish I could've been trained to care for more of them before the end of my internship.
Advice
It involves a lot of arduous labor, and you will be dirty by the end of the day! Be prepared for a workout, wear lots of sunscreen, and bring spare clothes to change into before you head home.
