I have taken out All-in warranty on my 66 plate van just over a year ago. I booked the van in with VW to inspect the bottom roller on sliding door that has collapsed. Warranty claim was rejected saying that the sliding door roller is part of the bodywork which is not covered. I have appealed and it is being reviewed as I write this. To be fair to the VW dealer, when they did a healthcheck on my camper, they spotted that the front engine mount has perished and that has been approved for repair under warranty.
They asked me if I wanted to get the door roller done anyway with a fitted price of £329!......I'll wait to see how my appeal goes and if not successful I will probably fix it myself with one from just kampers for around £30. I will keep you posted. The van will be with the dealer for the third day tomorrow.
The All-in works well for me as you get 2 services, 2 MOTs, breakdown cover & warranty for £34.97 per month.