The accompanying Filterpapierchen I do not use, I tasted the coffee without this piece of paper a trace aromatic, which is a well isolated by the manufacturer. The cassette already has two stainless steel permanent filter.
And then the cult factor making coffee: If you approach the filling of the cartridge with some Muse, it is also fun to prepare the first Saturday morning coffee in this way.
Conclusion: Unrestricted top recommendation