I have never..ever...ever...shot a deer over scent. I had just about given up on them until some provinces banned the use of them (which is usually the best indication that they work). But I don't plan to buy any again.
I've spent a small fortune on gadgets and gizmos over the years; some were useful - most weren't.
My advice...do your scouting... Pick a spot where there is clear evidence of deer activity (the more recent the better), keep the wind in your face and SIT STILL!!!
In the spring of 2007 I was the unfortunate recipient of an injury cause by a damaged carbon arrow that shattered on release of the arrow. I was in the yard going to take a few practice shots before dinner and the second arrow is the one that did the damage. That day will forever be burned in my mind. After I release what happened I made mistake #2 I pulled the tail shaft of the arrow out of my hand causing more damage.
Thank goodness that my wife was home and was able to...