Heavy wood cover. the heavier the better. Throw it in the thickest nastiest, deepest part and hang on. Don't trim the weed guard, don't trim the skirt and use the trailer of your choice. If it gets to the bottom without getting sucked in. Lift it and drop it. If still nothing lift it again till you feel it contact a branch and "feather" it over the branch and let it fall. reel in and repeat to a different part of the cover or at a different angle.
Does it work in weeds, rock s and open water? yes. But I find it is THE BEST lure to throw into wood.