Freaking great for the price, very clear sounding even after a while, I almost never change the strings in my acoustic so i know how strings rust and these are holding up (bare in mind I play them every day and that I have quite a sweaty palm). they hold the tuning sound clear to the ear and through my guitars cheap piezo pickup and they last at least twice as much as the none coated ones, and face it for 4,90 you wont find nothing half as good as these, this is thomans home brand you know it's gonna be good