My sister got a star chip on her car and within a day it turned into a full blown crack (the length was about half the windshield). I've had these two star chips for years and they're still just chips.

My mom's car got one and we used one of those star chip repair things that you get at pep boys. You inject some kind of clear gel into the windshield that supposedly repairs it. It didn't get rid of it completely, but it did reduce the size of the chip. Could hardly tell that it was there until you point it out. Plus I think it helps prevent from turning the star into a crack.

I've asked around, and a new windshield for my car is $105USD. That was the cheapest I could find and this is installeld wherever (work, school or home). At that price, you would've thought that I'd change my windshield already. h: