Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Breakable

The Shade Shack is a good idea and they work well when they are intact. However, there is weak spot near the point where the spring clip is attached. It is especially prone to failure on thicker sun visors. Two out of four have failed before I even had the chance to use them. Credit poor design or wrong choice of materials. Too bad, because it is a good idea.