Clarification........seeing game or being winded before using ozone and after using it. Ozonics is another thing to carry with you to the woods but it may be worth it.
I never used an in-field O3 unit but I do treat a lot of stuff pre-hunt, especially boots. I've done it for at least 8 years now and I can say without a doubt that the ground odor I leave is very much reduced. Deer seldom spook when they cross my entrance trail.
Stuff that I can easily launder will get minor O3 treatment. I will give my clothes for the day a quick O3 treatment, but I always wear fresh clothes so I'm not sure O3 will do much for them, but I still give them a light treatment in a garbage bag...usually run it for a short time while I shower.
Boots, bow, and the inside of my truck are the things I concentrate an O3 treatment.
O3 is hard on rubber (and elastic which has rubber...that's what makes it stretchy) but as far as shortening the lifespan rubber boots, I'm willing to live with the trade-off. I will buy a new pair every 3 years if O3 keeps ground odor to a minimum. residual ground odor is one of the most over-looked aspect of odor reduction.