The answer is yes AND probably not......
There is no disputing that Ozone (O3) kills odor; it is the industry standatrd of reclamation companies coast-to-coast and proven time and time again in laboratory settings, so in that regard it is really indisputable....when used to 'launder' cloths/gear, it is MUCH more effective than any scent-free wash/dryer sheet on the market. There is a running notion that the O3 produced, damages clothing, specifically degrading different rubbers, elastics, and adhesives. While that has been scientifically proven to be a downfall of O3, it typically does NOT occur with the generators specifically marketed tor hunters as they typically do not produce the concentration of O3 that creates this problem. In this day and age there is DIY option/opportunity for just about every product/experience known to man and O3 generators are no exception. You can do a 15-sec web search and find a host of O3 generators far less expensive than Ozonics. I myself have built several closets and mobile units from these generators and I will report the ONLY times I have noticed any degradation of material have been when using the units not specifically marketed to hunters....I do want to point out the ONLY degradation that I did experience was with the fine elastics of Ovis merino wool base layer waist bad and wrist cuffs...never anything else including the suspenders on my Sitka and First Lite gear or elastics on various packs, cuffs, etc.....
I do believe the Ozonics (and others marketed directly to hunters....GSM, Scent Lok,Scent Crusher, DDW, etc...) offer a distinct advantage in so much that they are small/portable, and battery operated. I have run my Hr500 everyday, for an entire week on a single charge on an XL battery using it to launder my gear 30-minutes after each hunt and 15-minutes before each hunt. They can be run in just about any closet, tote, bag, but keep in mind for O3 to be most effective it does need to come into contact with he odor molecules....jamming all of your cloths into a tote/bag and running the unit is not nearly as effective as hanging your cloths. O3 is heavier than 02 and the generator is more effective set above the hanging cloths (at the top of the closet/bag) as opposed to inn the bottom, below the cloths. If you hunt in the back-country or camps without the ability to launder your cloths in the more traditional set, these units can prove invaluable, especially in he early season or if you tend to perspire more than the average bear.
With all of this said, the Ozonics marketing campaign wants you to believe is that in an uncontrolled, open air environment an O3 generator hung above your head is going to ensure that the the O3 it's producing is coming in contact with odor molecules your body/gear is producing and I tend to think that simply is just too far-fetched for any reasonably minded person to accept as reality. IF it does happen, the O3 will destroy the odor, but it does NOT mean that game animals won't smell something out of the ordinary.
There is no substitute/short-cuts for careful planning and attention to winds and thermals both en-route to and while positioned on stand/blind. I, like most, believe you combat unforeseen changes, swirls, etc.....and can increase your odds by taking various scent eliminating precautions. Think about it, from the time the first scent eliminating sprays, detergents hit the market mos hunters flocked to them, then various scent eliminating clothing hit the market and most have tried one brand/piece at some point, the latest is the O3 technology. Again, O3 absolutely destroys odor molecules when it comes into direct contact with them, can that happen with a degree of certainty while attached to a tree in an open-air environment......I am going to say probably not....can that happen with a degree of certainty in a closet.....I am going to say most likely.
Sorry for the dissertation-type response...I should be in a tree but the 3" of falling rain changed my mind....lol
Joe