Accessories for the ipod ... headphones

Now I'm used to seeing all these crazy ipod accessories like the ipod flashlight/laser pointer, but this is the first time I've seen an accessory for the ipod headphones. These Griffen EarJams snap onto your ipod headphones so that they become in-ear earbuds, which since it goes deep into your ear canal, makes the sound so much more better. or does it?