Izon is an auto glass company that markets primarily at full-service car washes. Their strategy is to swoop down on you as you drive through, and pester you about how bad your windshield looks.
After using them once and having a warped windshield installed, I will not be suckered in again. Although they came out and replaced the windshield the next day, I do not appreciate being bothered and pressured to get a new windshield every time I have a small chip. They also call you periodically to offer to replace your windshield, which is incredibly annoying.