I actually ordered 2 sets a few months back as backup headsets but I haven't found the need to switch them out yet.
And I've heard from a buddy that the warranty/replacement with SkullCandy was quite easy. He sent in the non-functioning set and they sent him a voucher for a replacement. So not bad at all for $8 headsets
My 2nd pair is going to my Secret Santa person at work - as these are awesome stocking stuffers and a good item for the Christmas parties