Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good idea with apparent functional problems

Reviews for this sprayer were either very good or very bad, so I went ahead and ordered one on 3/1 to have it on hand for spring and tried it for the first time on 5/14. The pumping mechanism on mine is apparently defective. After rolling the sprayer around 100 feet, I had enough pressure built up for a low pressure spray for 3-4 seconds. I finally had to resort to rolling the sprayer several feet back and forth with one hand while trying to spray with the other in order to generate and maintain a minimal amount of pressure. This provides a pretty good workout but does a poor job of spraying. Since I ordered the sprayer early and did not try it for over 1 month, I can no longer return it to Amazon. After I am able to use up the 3 gallons of herbicide currently in the sprayer, I will not use it again.