Ozone generating devices (Ozonics) will chemically destroy human odor molecules as well as airborne bacteria and viruses (many doctor's offices use them in waiting rooms)...

The battery powered ones should work well in an enclosed blind (limited area)...in open air, the effect may not be worth the effort...

Whether the cost vs benefit and willingness to carry the device is up to you...

I do not use one as I always position my stands according to the wind direction (preferably in areas where deer cannot get down wind of me)... One other minor note is that I have had amazing luck with the deer that do get down wind of me in the last couple of years when I have been using a Thermocell...