I'm going to be honest.
The word 'Butlin's' seems to bring about a reaction in most people akin to 'marmite'; you either love it or hate it. In Butlin's case it seems that people have a stereotypical image of the type of holiday that they will have, yet when they actually experience what the Redcoats have to offer very few continue to have the image of knobbly knee competitions, Hi-de-Hi style entertainers and dodgy chalets with pencil thin walls and lino floors.
And I think one of the aspects of Butlin's which astounds people and leaves them wanting more is the entertainment.