No experience of it but it looks like a great idea and one that is going to grow and offer more choice year on year. Might give it a go, once we get used to campervan camping, next year (probably not worth signing up now as the current book runs out in February?). Lets face it, the cost of the book for a year is about the same as 1 or 2 nights on a pretty basic campsite so not really much of a risk to take trying it.