These are manufacturers' warranties you reference, I think.
Agree with the posters who suggest that sellers' return policies, that can amount to warranties of satisfaction really, are much more useful. REI, MEC, and Backcountry were mentioned. And there is always Bean's. Have noticed that EMS has a pretty good return policy also. With these sellers, you can just return a defective item to where you bought it for a refund, and spend the money on a better product. Common sense suggests there are some reasonable limits. Like throwing the item into a vat of acid and then returning it, for example. But short of customer abuse of a return policy, it's way more convenient to be able to just return a defective item to the seller and get your money back.
I recently had to return a defective air cleaner to the manufacturer when the seller insisted on me using for former's warranty. Two months, a ton of expensive packaging and mailing, a failure to fully fix (like with the OP) and a threat of complaints to the Consumer Product Safety Commission and many others - a super PITA, but a good squeaky wheel artist gets the grease eventually. Not all of us are artists, and even then it is of no use if you just happen be dealing with a gear version of the soup nazi. Just returning it to the seller for a refund would have been so much easier.