BFL ... No-questions-asked lifetime warranty.
When I was a kid I always found it amazing how the Americans could give "lifetime warranties" for their marvellous products like teflon pans or Dyson vacuum cleaners. "Wow - a 80 year guarantee!!".
Until I realized that it's only for the lifetime of the product. And that a new version of that product can come within a couple of month.
For me this was very disillusioning.