As a professional headlight restoration technician, I have never used an over the counter kit to restore headlights but around 85% of our customers have tried these kits with no success before calling us to get the job done the right way. Part of this unsuccessful experience could be due to user error and not being familiar enough with the process of restoration. In some cases, customers said that the kits made their headlights worse. In other cases, customers said that the kit improved the appearance of the their lights but the cloudiness and oxidation came back within a few months. At A Plus, we use a professional grade headlight restoration process and materials. We also back our process with a 2 year warranty.