It all depends upon the chip, whether it gets moisture and/or dirt in it, and the how good the person does working the filler into the crack. I have had professional and DIY repairs turn out spotless and I have had them leave dark blemishes. My Crossfire currently has four repaired chips I have done myself with a kit from Wal-Mart. Three of the four are only visible at certain times in the day when the light hits the windshield just right the forth is a dark spot the size of a pencil eraser. The best thing you can do to improve your odds of having an invisible repair is pull over immediately and put a piece of tape over the crack to keep the dirt and moisture out.