It works.  When you want to admire the mirror finish of your recently waxed car, and a thin layer of ambient dust has settled on it, this product takes off the dust without scratching.  Contrary to the description, it does not do the job in one swipe.  It takes two swipes.  Also, if your car is actually dirty, like it's been rained on, leave the duster in its bag and wash your car properly.  It's not going to wash your car for you.  No issues with red lint or streaks as reported by some reviewers.  Very happy customer.