As a business that targets " do-it-yourselfers" their refund policy is the worst. If the product you purchase doesn't work, you're at a lost. They don't pre-qualify the customer well enough by asking key questions, which means you could make a bad purchase. I purchased A/C coolant. I read the instructions, watched the video twice and followed each step, but it didn't work. The hose was too short and the nozzle was a bad fit. The store right away tries to blame my car and me, and then mentions some gage I should have used in the first place. Autozone would not budge so I have to contact their regional office and consumer protection. For $30 and for someone who liked Autozone, I think they should've refunded my money. read more