Now that I've finished using the kit on my car, I can't say I'm entirely blown away with the results, though I will concede that my case was a particularly difficult one.  For more common situations, the kit would have worked better.What made my case difficult was the following:- My headlights didn't match.  Due to an accident I recently had one headlight replaced. This new headlight was crystal clear and beautiful.  The other headlight was 10 years old, had faded and yellowed.  I managed to improve the look of the old headlight, but the fundamental problem is when many lamps age, they also yellow and harden as well.  So even though you polish the outside of the lamp, the discoloration which has occurred over time affects the material below the surface as well.  Try as I might, there was just NO matching the old headlight to the new one.  It just wasn't going to happen.  I wound up with a slightly yellow, highly polished 10 year old headlight to go with my crystal clear highly polished brand new lamp.  Less bad than before, but no where near the look of the new lamp.- My headlights were an odd contour.  I drive a 2000 Toyota Celica and these headlights are very elongated with a big "bump" right in the center.  This made it very difficult to get a thorough, uniform polishing of the headlight.  The polishing pad supplied with this kit is about 3" in diameter and flat.  This works great for flat surfaces.  However if your headlight has odd contours, it's going to give you trouble.I takes a LONG time to get a good polish on even an ideally shaped headlight.  The task is generally manageable if your headlight is a convenient shape (like the Taurus in the picture - small and round).  However if the lamp is larger and/or oddly shaped, you have quite a task ahead of you.  After about 30-40 minutes of work on a SINGLE headlight, I called it quits.  The headlight is now better, though nowhere near matching the other lamp.If I had two identical headlights of the same age (as most people will), the situation would have been better.  Still though, for the price, this is a good kit and a solid value.