I just stumbled on this recently so have no personal experience with the "refund claiming" portion but from what I can see there are a few nice outdoor retailers that you can get cashback with: Altrec & Backcountry 6%, Moosejaw 5%, Patagonia 4%, Sierra Trading 3.3%, EMS 3%, even REI 3%. Aside from some decent links to coupon codes and specials this looks like a nice way to take just a little off the top of the price:) Anybody with opinions or experience feel free to post up.