I haven't because of the high price but would be interested in seeing how they work out. If you have a depth finder on your kayak I'd let about 100 feet of line out and then track the botom while watching your rod tip to see when it starts to bump the bottom and then stop so it will float up and you won't lose your new lure in the pursuit of depth research. This should give you a good idea at how deep it's running and how I determined the actual trolling depth of a lure before I got my hands on dive curves for the more popular lures. Good luck and report back what you find out.