"I've owned an Ozonics unit of some sort for more than 10yrs now. . . I started with the HR230, then moved up to the HR300 & I recently got myself a new HR500, and yet again, I found myself very pleased with my decision! 2 yrs ago I killed my biggest buck to date at 40yrds, on an "iffy" wind, in high temperatures and I sweat. . like, a lot!! This year I was able to double lung a great buck at 14yrds with the bow, that was standing directly in my downwind scent stream!! I'm absolutely convinced that the Ozonics has helped tremendously in several situations!"