My children are 3 and 4. They really enjoy going here. They love being able to play in the sandbox, then getting in the pool or going over to stand under the big bucket when it dumps. The park has a 1 or 2 foot deep wading pool with a little slide and water jets shooting up through the water; a medium pool, about three feet deep with another little slide; and a deeper pool with the two big tube slides. We've only been there with the little ones and I can only say that the toddlers/preschoolers love it. They also provide life vests for the little ones. My kids can spend hours and hours there, as long as I refuel them with ice cream from the snack bar. I haven't really experienced the "grown-up" side, but it seems to be less than spectacular, with only two slides (although they are tall and look exciting). In short I would say great for little ones, maybe not so much for teens and up.
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