Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor performing product

I have a very small yard and have been using a small/basic gas trimmer for approx. 8 years. The gas trimmer was giving me trouble so I decided to try an electric trimmer. This trimmer is not adequate at all. It seems to have enough power but the line is very thin and gets chopped off after the slightest use. The line extension mechanism (with the tap) does not work. I used this product only once and decided to return as it was very frustrating to use. Just doesn't do the job even for a light duty small yard.