Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: material breaks down in sun; designed to fail

Had this in my pickup for about 3 years and it's brittle now with cracks the whole length of it. Before it started cracking, the vinyl coating was getting hard and the lock wouldn't bite but could easily be slipped down and that started within the first year. I still use it because it "looks locked" but now i'm shopping for a replacement. Don't think they don't know what sort of plastics they use in items. They don't want you to have to buy another sooner than later of course.