We used it for a couple of yrs back in the late '80s on no-till corn. It was sold as a companion to atrazine. Needed ATZ to work. Had a bad smell if I recall correctly. You could really smell the field when you got done.

It worked fine then, but that was back before waterhemp was invented. Velvetleaf & lambsquarter was a concern then. It worked on them. Not sure how it works on TWH or similar weeds.