I agree with ks - only worth it imo if the children will be really happy going to the clubs. We haven't gone again as I don't think my 2 youngest would go in the clubs at all. (also we would need a second mortgage to afford to go in the school holidays).
I have been twice and am thinking of going again. We all really enjoyed it. The village rooms are nicer than the hotel ones and very spacious. Our ds's were 3 and 4 when we were last there and they loved the clubs.