Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Looks great, but doesn't work!

Tried to use this great looking cable from the cable outlet to the cable box. It didn't work! Tried various tests, because it looks so good that I really wanted it to work, but no dice. Even tried it with different TV's! So I had to go back to the ugly back coax that the cable company installed. Bummer!