Well on the +side, it is much less messy than the liquid I have used. On the - side, I had to use 3 tables in two gallons of spray to get enough color to see where I had previously sprayed.
Worked well, but they took a little longer than expected to dissolve in my weed spray. Next time I would allow 10-15 minutes and then shake vigorously to get even color tone. Great product.
Used this when applying Dimension 2EW herbicide. Left no markings at all. It says for use with insecticides and fertilizers, so perhaps something in the herbicide prevented it from working.