It works.
It works as advertised. The button to increase fan speed beeps when you press it, and is VERY sensitive (so sometimes you whizz through the fan speeds faster than you wanted to)! With the car noise, and during the day, you can't see or hear if the machine is on, but at night it's easy to see due to the lights! If you have the fan on high, then you can hear if it's on, but at low fan levels, it's hard to know if it's working or not. A little light up top would be useful to know if it's on or not.
The placement of the outlet/fans are 180 degrees from eachother on each side. I don't think this is a good design for a car air purifier. They'd be better placed BOTH at the front, because the purifier is going to be used near the driver. Then you'd get the air going into the cabin better.
It takes time for the cabin to clear, so works better on longer (eg 1 hr + ) journeys. Driving up to 1/2 hour you don't really notice it doing anything.
However, for the price, and the fact that the machine actually works, it's not a bad little air purifier.
Verified purchase: YesCondition: New