Some call me cynical, I think I am realistic.
I have not heard of them, I assume they are a small operation, nothing to suggest otherwise.
They seem to have some other lines but this appears to be the main one.
Not sure if it is reasonable to expect any OWB to last that long.
I can think of at least 2 OWB Manufacturers that are no longer around, one reincarnated under a new name but did not honour its predecesors commitments.
If there was a problem with leaks I think it is reasonable to assume they are unlikely to be one off's. So a major cost. And more difficult to be funded.
Difficult to see that OWB's will still be around that many years in the future.
Logically they should put a percentage of their income into a trust fund to pay for future warranty commitments. Never seen one do so.
They do have the warranty wording on their web site, but it is not that difficult to word it to it is effectively meaningless in the longer term.