From Bordercollie: "...requirements for having written proof of all manufacturer recommended inspections and services for all appliances, etc." That's where they really have you - who is going to do all the "recommended" stuff when it's not needed, only recommended. If you have a problem, even when the problem isn't related to some service not done, they can and often do (as frequently mentioned in MH magazines) reject the claim. So, unless you're buying a potential problem unit, and why would anyone do that, just do as so many have suggested, don't buy the extra cost warranty. JMHO.