We went this past summer. It was nice. They let us in the water park before our check out time and let us stay pretty much all day the next day, although we had to check out of the room. So, while it was expensive, we got our fill of the water park. The place is nice. I don't think they have a separate pool, but the lazy river is pleasant.
The restaurants were mediocre. We didn't want to have to go offsite to find something better (there are tons of restaurants in Lake George).