I replaced a 'premium' set of earbuds ( theZune Premium Earphones) that use the silicone skirt design with these. Complete satisfaction - they have never fallen out (even when I dropped my player, the cord unplugged before the earpeices could pull loose), the sound quality is great, and the soft rubbery earhooks are so comfy I forget I'm wearing them. I expected performance like this when I spent $40, but for $10? Very cool.