I have both Air Tabs and air deflector. Deflector used on headache rack on long box dually with golf cart with long top on cart. Up, over, and around front of airodinimac travel trailer. Haven't washed any bugs off in 20 years and 2 trailers. The Air Tabs really eliminate the bow wave from passing semi's. No push as they come around you. Also keep the back of your trailer clean as the vaccumn doesn't come back together until about 20 feet behind your trailer. Happy with both products. I keep my units for a long time, so worth the expense for me.