Since I have a young child, I'm completely paranoid about air pollution. As those of you in HK can attest to, the air was really bad this weekend. AQI of 150+ is unhealthy for anyone. I have a small air quality meter and can now confirm that the bioweapon defense mode takes the in car air quality from bad to great in less than two minutes. The hype is real and I for one am happy I spent the money on a MS.