Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 2 out of 3 are defective

I have purchased lots of HDMI cables from Amazon in the last 6 months, several between 40 and 75 feet long, plus three of these that are 25 ft. I finally got around to testing them, and every cable worked fine except for two of these 25 ft cables, which would not carry a usable signal. As a result I have no confidence in the third one. IF you buy these, test them right away to see if they will work for you. I waited too long, and the return window expired, so I am out of luck, but at least I know to avoid them in the future.