Seems to be a kind of bait-and-switch operation, see this G+ comment by Lance Nanek: >>It's pretty common on amazon for some good items to be shipped to get some good ratings, then for the seller to replace them with cheap, almost non-functional, shoddy replacements. It's happened to me before with bicycle equipment (pushing the button on a rear light pushed right through the casing, etc.). So it's entirely possible you got a good one from their initial offering, then they started selling something else.<<