I've use it all and this is the only stuff that ends ant problems.
I sprinkled it around the mound and all, and I do mean all the ants took the "food" down the hole to feed the queen. The sprinkeled "food" was gone in minutes, as I watched.
The next day the ants that could still work were carrying dead ants out of the mound and piling them up around the mound - the next day there wasn't an ant to be found.
The stuff is VERY EXPENSIVE, but it doesn't just kill the ants you see, it kills the ones way down under the ground, and the kills the queen.
Naturally, the queen eats the bait and dies. Which means she can't lay any more eggs. And the mound does not survive. End of problem!
If I ddin't see it with my own eye's, I wouldn't have believed it. It was more fun than burning them with a magnifying glass when I was a kid.
Another time I placed the bait several feet from a nother mound and watched just one ant grab it, but somehow told his friends where the food was, then they all came over to feast - same results, next day gone.
I even take it camping with me and sprinkle around the tires of the motorhome.
http://www.amdro.com/