OR Crocs here. Their customer service is unreal. I've worn out a couple pairs, didn't feel like they owed me anything, and bought a new pair. But I know guys who've returned them for a new pair after years and years of use. Kinda abuse of the warranty IMO, but still impressive that OR honoured it, no questions asked. The only gripe I have about them, is that the Velcro tab on the toe wears out to easily. Nothing that really effects function tho.
I've used the Or warranty on a puffy jacket and came away very, very impressed with how they handle things.