Rubmeister, I can only note that I own three, and I'd buy more. If they "lower the allergen count to below [my] threshold for reactions," then isn't that exactly why I'd want them in the first place?
I know that there is a lot of controversy about these units (as there is with absolutely EVERYTHING in these days of the internet, with counterclaims flying every which way), but I'm pretty quick to abandon anything I think is a dud -- and I am so impressed with my units that I would love to have at least three more. I definitely notice cooking odors and other odors lingering much longer in those rooms that don't have a unit, compared to those that do. And that's exactly what I want an air cleaner to do: freshen the air.
With respect to safety, if I'm going to get rid of these for generating ozone, then I'd better ditch my TV, monitors and a few other electrical appliances around here. As long as you're not breathing in high concentrations of ozone, you're safe enough. The whole idea behind ionic air purifiers is that negative ions don't stay negative ions very long -- they're quick to bond with positively charged particles, which is how the whole process works. If you were to flood a room with negatively charged ions, then they would start looking for places to share their spare electrons in your flesh (which is why ozone generators work and why it's dangerous for people and animals to be in closed quarters when one is running) -- but the purpose of ionic air cleaners is simply to increase the frequency of negative ions in room air, not to flood the room with them.
..c..