Who used car air purifier? Is it useful?

It will be useful. My wife is carsick. She used to always say that the smell in the car was terrible. Now that she has used car air purifier, she feels much better and the smell in the car has been eliminated a lot. And I understand that car air purifier has the functions of purifying formaldehyde and PM2.5, sterilizing and detoxifying. Now the air is getting worse and worse. A car air purifier is not expensive, but it does improve the air inside the car. I use the brand of LightAir, Swedish brand, so the landlord might as well try it.