I’m currently using a pair of them for pour-over in a Hario V60. As others have mentioned, they do taste differently than paper filters. I rinse them thoroughly after each use, then hang just inside a sunny window to dry quickly. I also alternate each day between the two that I have, so that each one has an extra day to stay dry. Doing this while boiling them once a month or so keeps them well cleaned, no odors or odd tastes. However, you do end up using a decent amount of water over time to keep them clean; it’s unclear if saving a year’s worth (how long two CoffeeSocks last according to the manufacturer) of paper filters is worth the extra water consumption. I’m thinking of switching to paper myself, and keeping these as a backup.