My experiences with Ozone....
Scent Crusher bag- My opinion helps cut odors, have seen more deer and less spooked. Not a 100% throw caution to the wind solution as I am VERY strict on scent control during the year (a month before season I start all scent free, including no kisses from the fiance with perfume all over her)
Ozonics tree unit- My bro in law has it, throws caution to the wind, and the woods is essentially ruined when he is done hunting for 1 week. Now not every person would do it the way he does (he doesnt know which way a south wind even blows) but my experiences is it hurt the hunting after it was used more than helped.
Thats my experiences, I dont buy into the ozone other than the bag HELPING, not a cure all.