IT IS A GIVEN I should not have to say that you should go in dressed nicely with some sort automobile windshield chip repair of logo on your shirt or hat that shows you are serious and you are a professional.
Insurance companies are more susceptible to cover the windshield if it is on the driver's side or if it is a more intense crack because it is more important to get it done in that case. They do not want any obstructions of view in the line of vision for the driver.
Now that you know what can and can't be repaired, there's one more thing to consider. Time!! Many factors like extreme heat or cold and even your air conditioning cooling down the windshield on a hot day can cause the damage to get worse. The longer you wait to repair the damage, it could spread and may turn a repairable situation into a full blown windshield repair costing YOU more. Most insurance companies WILL cover a rock chip on the windshield at no cost to you. Speak with your insurance agent to get more information on what they will cover when it comes to windshield damage.
If your windshield is cracked or chipped you need to get windshield repair. Most times people think they will need to replace the whole windshield. However if you get the repair completed soon after the crack or chip occurred, it can easily be repaired. It really takes no time for a repair specialist to repair, and sometimes auto body shops offer a mobile service where they will come to you and repair your windshield. As for cost, it is affordable, and most times your car insurance provider will pay for most of or the entire repair.
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.
One way to find out about a companies reputation is to call other repair techs and ask them which company they bought their repair kit from and are they satisfied with it. Call the company itself and ask to speak to the owner. You will get a good feel for the company after having spoken with the customer service people and the owner.