I had an email exchange with REI's customer service recently about their return policy. I bought a pair of winter boots toward the end of the season last year and never really wore them (no snow last winter.) I've had opportunities to wear them this winter, and they're pretty well broken in now but are still killing my feet. I realized recently that my year was up, so I contacted REI.
REI's rep told me that anything purchased before the policy change is still covered by their "forever" guarantee. My boots fall into this category.
I think, though, that this experience with my boots shows that it can sometimes take a year to test a product. A lot of us take advantage of end-of-season sales for big-ticket seasonal gear. Last year's warm winter meant a lot of gear didn't really get used. My X-country ski boots were almost brand new this winter even though I've had them for nearly 2 years.
That said, my biggest beef is with their new 30-day policy for the Outlet. If I need gear for a trip, I'm usually shopping a few months out, rarely within 30 days. With the exception of some clothes and everyday items, the new policy makes the Outlet almost worthless for me, which is too bad. I used to get a lot of things there.