1. Cost Savings a windshield repair is hundreds of dollars less than a replacement. A chip repair prevents a crack and crack repair prevents a replacement. Whether you have a chip or a crack get it repaired ASAP.
2. Safety preserving the factory seal. If you are in accident the windshield is a major part of the airbag system and the roof support. Your best chances to avoid injuries or death is with the factory seal.
3. Quality saving your windshield preserves the higher quality Original Equipment Manufactured windshield. OEM windshields have precise surface control so the wipers remove rain are solar optimized to block UV and reduce heat buildup in a parked car by as much as 45 degrees F and while driving which reduces use of the air conditioner saving gas mileage and; have acoustic attenuation which give a quieter ride by reducing road, tire and wind noise. Click the section below to read more about Glass Qualities and Properties of OE vs Aftermarket.

SOURCE: http://nwrassn.org/consumer-information/