Never mind the whole dirt thing, they are so da** expensive, it would take about 100k miles of using it before you just broke even on a $10 paper filter.
The "extra flow" is useless. The throttle body regulates the amount of air your engine needs. If it's opened up a certain amount, your engine is pulling all the air it needs. If you need "more flow," step on the gas more. The throttle plate will open up some more. Boom, instantly more air flow, no cr*ppy filter required.