Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy

This is the worst piece of gardening tool I've ever bought. You can only trim a 10 inch area before you finger starts cramping up. The safety lock has such a small hold you have to push, in order to pull the trigger, so its not like you can just turn it off and rest your fingers, you have to go through trying to push that little hold and then at the same time pull in this trigger that's so stiff and hard to keep in its ridiculous. Then to change the blade, another horrible design, you have to balance this blade while trying to get the top part on and aligned with these little cheap prongs made out of cheap plastic. I've even written them and the company's customer service sucked. I gave them one star only because they make you put something in , I don't think it even deserved that. There is one made by craftsman that was great and then they quit selling it, now I see one just like it made by American Gardener*****Do Not Buy Black and Decker*****