gdgt

i have owned these for about 2 weeks with regular use on almost all weekdays. sound is incredible. as the product mentions, the iphone buttons work well. i have not had a chance to use the microphone, but i dont plan on using these for hands free.
good thing is they wokr great on the mac as well including the volume buttons.
if you have a iphone 3g, the volume buttons dont work.
the headphones create a vacuum and you cant hear anything around you. you might want to keep that mind if you need to be aware of ambient noise in you workplace

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update: i had a biking accident and these headphones got damaged. i called klipsch for getting them repaired and they offered to replaced them for free including shipping. customer service is awesome and makes me want to buy more klipsch products. it has been less than 6 months. bought from amazon.com