Atrocious Customer Service
Ordered a specialized filter for a specific event and was instructed to select "express shipping" for an extra $22 so it would arrive in time. The filter did not arrive in time, and K&F Concept customer service has been atrocious. They insist that this is a "return caused by buyer," and therefore refuse to reimburse both the initial shipping cost or the return shipping cost. They can't rectify what should be a simple issue; save yourself the time and frustration, and look elsewhere.