My family has stayed here many times. There rooms are decently (and I use this term loosely, seeing that it is still much overpriced, as is everything in the Dells) priced. We have stayed inside the hotel rooms, in a large condo on the golf course, and also in the cabins, about 5 minutes away from the actual hotel.
This last stay we were in the cabins. The room was cheap. Period. Chairs were broken, the televisions were ancient, the bunk beds were slopped and misshapen, the rooms smelled like mildew. This was just the short list. The cabin was not cheap either.
The outdoor water parks are fun; there is definitely a lot to do. The areas are kept clean.