I have bought a bunch of these things over the years and they are good antennas.
The company says
All of our antennas come with the only lifetime warranty on the base coil that is known to exist in the industry.
I just learned from Dick Metz that the antenna is waranteed only for the original owner and with a receipt. He says "some people are trying to get a free antenna."
It's not an expensive piece of equipment, about $50, but it would be helpful if they would be clear on their website. Many people don't save receipts. It seems like they are trying to get kudos for a warranty that is in fact limited.