There aren't very many wireless headphones around to choose from, but these definitely rank at the top.  The only drawback is that they fit around the back of your head loosely (not adjustable), so it's not comfortable to sit back on a plane with them, or go running.  But they are easy to work, the sound is awesome, and once you try these wireless headphones, you won't want to go back!  As someone who often got tangled in her headphone cord, these have been my new favorite toy. 

Logitech does not do these justice with their advertising, though.  They sell them as replacements for Ipods and...