It is kinda small for my yard (over an acre) but it works well. I have not had to replace the string yet so I can't tell you about that. It is light weight and easy to use. It will take down very tough weeds and tall grasses but you can only swing it a few feet in each direction and it has to be pointed straight down for good coverage (You can't hold it on any kind of angle or it won't work well).
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