One of my hunting buddies swears by the ozonic. I don't know which model he has but it is 2-3 years old. He won't hunt from a stand without it now. He does kill some big bucks every year in WV and Ohio so maybe there is something to it.

From what I can tell, the fan is pretty noisy, it smells like mildew and it would be a pain to lug in and out of the woods and have fresh batteries for it.