- cannot overstate lack of lag and simplicity. You plug in and it works, perfectly, every time, forever.
- easily switch devices. I use my headphone on my phone, tablet, laptop, Synthesizer, Groovebox etc without a blink. And my phone never stops playing music and connects to our car my wife just started the way bluetooth ones do :-)
- to me, it's like email. Icq, aim, msn messenger come and go, yet email is old and boring but survives.
There's absolutely a time and place for wireless headphones and I probably use them more at this point. But killing 3.5mm from phones has been a Massive annoyance.