Cool water
Free life jackets
Food prices decent
Gutter with running water so you don't have to worry about hot Arizona sun baking the pavement and trying to walk on it.
Clean ladies room
Wave pool fun not many people on week day
Rented boogie board $5.50 raft $6.50
Went with 5 grandkids ages 7-11 and they had a blast. We got them Group-On coupons for Christmas.
We ate lunch in the car based on reviews we read here.
Don't try to sneak food into the park, they go through everything you bring in and even pat down your towels to make sure nothing is hidden.
I highly recommend that you go in with the least amount of stuff possible, no chairs. Sunblock and maybe one towel for every 2 people. You just aren't going to be sitting, you will be "playing".