Paper filter with better flow through is so important, because you don’t need to experience:

Sediment in your cup---Thicker and poor filtration paper makes water overflow at the top of the brewer and brings the grinds out to your coffee.

Bottom tears out---Even worse, under high water pressure, the poor filtration paper bottom tears out and dumps coffee grounds into your cup.

Coffee taste weak---Poor filtration paper makes the coffee grounds got pushed aside while the water finally forced its way through.

Saves on cleaning out the keurig coffee filters---No mess, you don't have to touch any coffee grounds.

Keep cholesterol in check---Unfiltered coffee oil ups the cholesterol.