We did (same thing, included with the Universal tickets). Get there early as it gets really crowded (at least it did when we were there) and the lines can get really long. Overall it was ok. We have several waterparks near our house and it wasn't much different from any of them, other than it seemed to be more crowded. We were there for 16 days and only went once. The kids said they'd rather see/do the things they couldn't do at home and for them Wet n' Wild wasn't something different.