Now we need someone to test these out, and since it is Costco it is like trying them out for free. These are not electronics so Costco should take these back no matter what.I've watched one comparison video from Australia; It looks like if one is on a budget and knows about the potential issues the knock-offs can be fine. They don't appear to handle the weight of the vehicle as well, and don't return to "normal" shape as well. The presenters other main comment was the handle positions for use as a shovel. The maxtrax were a lot better from an ergonomic sense. I wonder how many "copies" are out there these days? Definitely a lot easier to return through Costco than ebay though.