cabin air filer

I was wondering if anyone is using the K&N cabin air filter? What do you think of it? I was wondering if its worth it?

Has anyone changed their cabin filter yet? I was sitting in an V6 NAVI Sedan at my dealer's 9th-Gen Rollout Party (complete with chips & salsa, cheese & crackers, the whole bit) while the Service Department was finishing up washing my car after an oil change a couple months back, and it...