I bought this to use with the XLR8 that bout for getting rid of clover and crabgrass. It worked great and killed that stuff off quickly. Clover is tough to get rid of and Duo Stick worked better than a regular surfactant that I had.
To exactly sure how well this works, but you can clearly see how it makes the spray bond to the weed. Used with the spray I ordered, you can clearly see the results.