There is Always a chance for a Rock Chip to break during the repair process.
If it does, your windshield will need to be replaced and the cost of the replacement is the Customers Responsibility.
After a Rock Chip is repaired, you WILL still be able to see the damage. Rock Chip repairs are not a cosmetic procedure! The whole idea is to stop the chip from turning into a crack. How well the chip clears up depends on many factors, including, but not limited to: SIZE, TYPE OF BREAK, TEMPERATURE and HOW OLD THE CHIP IS.
Simple fact, is the chip is a distraction now it will more than likely still be a distraction after the repair.