Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Won't buy theirs again

Bought a pair of replacement wiper blades for my pickup truck and the first time it rained after installation, one of the blade retainers separated from the wiper blade itself. It didn't come off but slipped out of position and was scraping across my windshield. I could have lost the entire blade refill but I stopped and snapped it back into place and all seemed OK. Unfortunately, the same thing has happened to the same blade twice more since. Anco refuses to accept any responsibility for the failure or even show any interest in investigating what is obviously a manufacturing defect. I offered to send the failed blade to them but they declined. I'm done with them after 40 years of driving. I will choose a different brand from now on.