Bought one right before the season and it really helped. I have a few stands that deer come from just about every direction. There is no "good" wind for this spot. I had deer walk in from downwind on several occasions. They didn't seem like they cared. Ozonics isn't cheap but neither are ScentLok suits. What's nice about Ozonics is you don't need to shower after work like I did with my ScentLok. It basically adds 20 minutes to my hunts every night. When you consider that, it's an easy investment.