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From what I've seen, regardless of the product, if you have to ship something back, the cost is on your wallet both ways.
I wonder how many tubs sold in fairs and parking lot events end up with sun damage? I wonder how many deaers/manufacturers take responsibilty in those situations.
D-1 has the "lifetime" on their Resin shell (ultra life HP). The warranty reads ( or at least it did) that the customer must pay the freight to the factory if it is deemed necessary by the factory rep. I was told however by the CEO of D-1 that they had not actually charged anyone freight to that point. (several yrs ago)
Also saw where there are only a few brands that allow transfer of warranty to new owners. Who are they, not that I plan on buying used or want to sell a used one with warranty.