None of them guarantee work 100% of the time. The best by far is urine pulled from a fresh doe kills bladder with a syringe. Either use it fresh or freeze it. I have had successes with Hoosier trapping supply doe in heat. Killed a mature 11 last year that came on a string down the road I walked in with a drag. Now did another mature deer cross that road and not pay it any attention or spook? I couldn't tell you. Im sure that scents spook as many deer as they attract, you just have to catch the right buck on the right day in the right mood. I will also add that a downwind buck that can smell an over the counter scent can probably smell you.