I purchased an auto battery for my wife's VW Beetle in Nov 09'. I experienced no battery related difficulties that I am aware of since.
I took the car in for regular service this month at the local VW dealer, where I have done business for 10 years. They tested the battery as part of their routine. Their test results showed the battery was "bad". I have the readout from their machine. They replaced the battery.
Curious as to why the Autozone battery had failed, I took it back to the store. The store's battery tester showed the battery "OK". The employees were very polite and helpful, but could not explain the discrepancy. They suggested that I return to the dealer for an explanation and possible reimbursement. I went back to the dealer and spoke to the VW service manager. He could not explain either, but asked if I could go back to Autozone and ask the manager if he would be willing to speak with him on the phone. I think our attitude was "how can we solve this problem?", not trying to cause a fuss, because indeed the Autozone battery may be just fine or someone's tester is malfunctioning or using different criteria
The Autozone manager was extremely rude, and would not even listen to me. He did not even know what I was going to ask of him. I would like to point out that all through this process, I was extremely polite and non-accusatory, just trying to figure out the problem. I walked into the store and he said "We've tested that battery and there is nothing wrong with it, just get the *** out" I then responded in kind and left (for good). So I now have two batteries and no explanation, along with a very negative feeling toward Autozone.
Product or Service Mentioned: Autozone Manager.
Monetary Loss: $115.