I am expecting some paint chips. I am expecting to buy one with around 15k miles. Taking the car to the place you had it done is another advantage in terms of being able to have any paint chips rectified pre protection being applied. The only questions for me are around its protective properties, price and for me it being a 4 hour round trip for drop off and collection. Ultimately they cant guarantee against chips because a boulder could hit my car! It will be interesting when more comparisons are done between the two in terms of resistance to stone chips. Also, PPF has self healing properties so when it does pick up scratches it does self heal under warm conditions and I don't believe the spray on stuff does.