This is a cool concept, especially for those who often drive with multiple passengers. I've been using it in my sedan with my family of 5, and since we keep the windows closed most of the time, having clean air is crucial. I have it connected to the USB port, so it turns on and off automatically whenever I enter or exit the car. It's pretty quiet on the low setting, which is where I usually keep it.
When we're driving with it on, the car always smells fresh. It fits nicely in my cup holder and requires minimal maintenance, just regular filter changes. It definitely makes a difference, especially if you frequently have passengers or simply want to ensure fresh air when the windows are closed. I'm a fan and would definitely recommend it.