Been here at least three times, maybe 4.
This zoo is HUGEEE. There's tons of hills and land to walk, even with the zoo mobile it takes the entire day to get through this place!
I would probably go again in the hall when it's cooler, but in the summer it's just too much in terms of heat exhaustion.
The animals are hit and miss, sometimes i see them, other times i don't.
If you do come prepare with tons of water in your backpack, wear running shoes and bring a hat! Or just go on a cooler day!