I've tried flame weeders, which are incredibly satisfying, and great for seedlings, but certain established weeds just spring right back. This tool really gets the root out. It can be difficult to center just because it's hard to see exactly where the center of the weed is, but that's the hardest part. Once you learn how to do that, you just step on the foot peddle-lever to embed the tines, then I think it works best to slowly pull the handle toward the peddle, which forces the tines closed, the...