If it's doing such a good job of covering your scent then why not hunt from the ground?

I've had deer what looked to me straight down wind many times and not smell me. Sometimes the wind swirls or carries your scent in other directions than what you think.

Weather plays a big roll also. If you hunt with dogs you will see some days a dog can smell a bird with no trouble at all and other days they will walk right past them. On the dry days they have a hard time picking up the scent. Nothing the bird did different to not get smelled just that the conditions changed.

In the early days I tried every cover scent you could think of and some you will never think of. If it makes you feel better thats fine but.... I wouldnt put so much trust in it that I make bad choices and hunt an area when conditions are not right. You will never know how many deer you do scare away. They all dont snort and run away. Many times they will pattern you and you will never know it.