If an actual lifetime warranty is not possible, then put some time limits on it. But a vague, hand-wavy, "we'll warranty it if we say so" deal doesn't appeal.
I ordered one of the FA shells a long time ago. The fit wasn't for me, plus the hood wasn't big enough to fit over a helmet, so I sent it back to Freddy. I expect he's got that sort of stuff ironed out by now but in the meanwhile I bought an Arc'teryx shell that I am super happy with.