I LOVE Roundup! Works great! Buy it buy it buy it! Well, ok. I'm a FORMER roundup user. I have been working out of town since 2005, so the PI has regained its territory with a vengeance. I have decided never to use chemicals like roundup again, but I also refuse to believe that there isn't something out there that will eradicate it (besides goats). Spraying with bleach? Ammonia? Vinegar? And what's the name of that herb that's a natural healer of it? Jewel weed, isn't it? Will jewel weed banish it, or does it just compete with it? And the truth is, roundup seemed to be just a temporary fix, even using it at the recommended strength. Miss one plant, and back it comes. Not worth it.