We stayed here in February 2008 and had a WONDERFUL time! We were there mid-week so the rates were low ($80 per night for our family of six, including waterpark passes).
This was the place where my (at the time, ds8 and dd6) learned to love waterslides!! We had the place to ourselves on a Thursday night. We enjoyed the spacious and child friendly (supervised infants on up) splash pool (maybe 12/18 inches deep) with pirate ship. Our older three (ages 8, 6, and 4 at the time) enjoyed the waterslide (the 4 year old rode with Daddy as he couldn't quite stand up at the end).
Friendly staff. Reasonably priced pizzas at the cafe after swimming. Great time had by all!!