The reason that cracks often start on the edges of the automobile windshield chip repair is because the edges are the structurally weakest area. The frit is on the glass because it keeps the ultraviolet light from the sun away from the polyurethane seal that holds the windshield in the frame. Without the frit, the windshield would quickly start leaking or just pop out of the frame of the car.
It's the same thing with a windshield. Why would anyone want to repair a windshield which is the only thing that protects you from oncoming objects to your face? Having a solid windshield in your car rather than a repaired one is probably safer and to me makes more sense.
Warranties may not seem important, but they really are when it comes to windshields and windshield repair. A reputable company will certainly stand behind their work and have no problem guaranteeing that work. Any future incident could be the result of work that was not done well and you want to make sure that you have a recourse that will not have additional costs.
A windshield repair, when done correctly, is the safe choice. But not all damage is repairable. For as many types of debris that exist to damage your windshield, there are as many types of chips and cracks that can result. Some of the most common types of chips have been named.
Still no big deal? In some states it's illegal to drive with a crack in the windshield that is in the driver's line of sight. In other states it's illegal to drive with a cracked windshield at all. I'd call that a big deal.
Not all chips and cracks can be repaired when windshield damage occurs. It is definitely worth the time to have any damage evaluated by a professional to avoid further cracking and damage and eventual replacement.