I think the Provo Eastbay McDonalds has my favorite playground so far!
Lots of different types of toys. It has the musical slide & guitar like at the Lehi one. It has a big climbing toy but also a small toddler climbing area like at American Fork but with a slide (yeah!). It also has a little basketball court! So for all ages and personalities.
It's in a separate area so they can run free without upsetting non-parents.
It's in a separate area. The door to the play area is right by the exit so trips to the bathroom or for refills include the danger of a child trying to run outside and the hassle of ushering them through two sets of doors. If they had a separate bathroom and drink station in the play area it would be perfect.