I was initially skeptical about any product claiming to produce a cleaner, clearer headlight lens with almost no work.  I have tried other similar products and found them to be a waste of time and money.  But my wife has been complaining about her headlights for a year so I thought I would take a chance with Meguiars and found, to my surprise, that this product actually works.  Before I used Meguiars, her high beams would shine little more than her low beams.  After Meguiars, the high beams were bright, and her low beams were back to original specs.  All this on a 10year old car that had the original lens.  Great Product.