I can't speak for all the gadgets, but i can speak for these Tinks #1 and #69 work great for me. I don't use it to attract deer, more to cover up my scent. That and Carbon Clean in a spray bottle. It works good . At least I think these all work good. i could just be a deer killing Ninja and not even know it. But hey I am sticking with what I know.

Oh and it helps if you are in a decent spot.... I am between a rub and a food scource. So that may be why Ihave had good fortune.