Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Design Flaw

The problem with this product is that the retractable USB plug loosens as you use it and before long it becomes very difficult to insert the device into a computer without the USB plug retracting on you. I purchased the device with the retractable USB plug because I did not like losing the little caps, but I would rather use a standard device without a cap than this device that can no longer be used.