Yup, I've used it... I have to admit it works. This last crop I harvested has very few seeds even though I spotted some herms early on, I hit them with some Reverse and Penetrator about 4 weeks into flowering.
Just remember you dont dilute the stuff, you gotta use it right out of the bottle, straight. And you gotta use it pretty religiously. for a week when you notice the herm'ed plants. Remember to use it with Dutch master Penetrator. It really helps...
The biggest drawback is well, I think it makes your buds taste wierd. Don't spray it too late into flowering!
Also the price -- you cant dilute the stuff with water. A quart of the stuff lasted me only one spraying
