Air ionizer does work pretty well. Left it on for a few days while away from home & when I got back, the air smelled differenent & "cleaner". When dirty particles get on the ionizer rods, it barely makes any noise & it is easy to clean also. The car ionizer on the other hand is kind of junky, cool to have if it works & I'm not quite sure if it does or not. It does not fit very snugly into the 12 volt outlet, lots of the time comes loose, it is kinda large, so it sticks out & gets in the way. Have had other plug-in car ionizers before & they were mostly junk too. Overall I would recommend this product. It is my first home air ionizer & I think that it does a good job.