Should I buy an extended warranty with my new van build?

Hi, I’m purchasing a new van build through a van build company and the they are working with a local dealership to the financing. The van itself comes with a 3 year 36,000 miles warranty as well as a one year warranty from the van build company. The 7 year extended bumper to bumper warranty that covers the van and the van build is an extra 10K.

Does anyone here have any experience with purchasing one of these extended warranties? Any helpful feedback would be helpful