I dont, but they aren't without value. Just a numbers game. Just know that their cost for those items are significantly lower than what they initially offer you. They often start way high so you end up thinking you got a great deal, but you can buy this stuff from third parties after the fact too. (generally cheaper before your factory warranty expires) . Also depends what youre buying. You're spending the money now on a possible repair 5-10 years down the line.
Personally I enjoy adding a bit of risk to the deal, but I also dont mind doing some of the work myself.