Round up tends to be a household name in weed killers. All environmental issues aside, it works fairly well when used properly. Proper use is key though. Don't use anywhere near plants or things you don't want to harm and don't use any herbicide on a windy day! I have used this product (it seems like a number of other reviewers have not, that's interesting) and found that for my purpose it worked well. I was primarily using it on invasive cactus. It killed the majority of the cactus, and everything around is doing well. My chief complaint is that the concept of the sprayer jug is great, but execution is poor. When the jug was about half full the pump and sprayer stopped functioning. No amount of declogging or troubleshooting would remedy the problem. I don't use chemical herbicides unless it's a last resort, but I won't buy in this format again even if it was the greatest idea.