For $18 + headphone speakers, can't beat the price. Worked so well I made two to keep at different locations and also carry one when flying. There's an instructable too http://www.instructables.com/id/Jackhammer-Headphones/
The difference to mine is that I drilled a hole to pass the wires and used hot glue to make sure there's no way sound can come through there.
They're less comfortable to wear since they squeeze your head harder than headphones (maybe I could adjust mine by stretching the metal headband with two vice's or something), and they have a bit more weight. But for $20 instead of $300, and hack factor, you win hands down! :)
I have a pair of their older on-ear model (replaced by the OE1). At the time, they were the most readily available pair of head phones where the main cable separated from the head phones. Most of my headphone failures over the years were from the stress at the device end of the cable. I have fixed this a few times but it's easier to get a replacement cable. So for the 199 I spent on the Bose, these are the best value for money head phones I have so far.
Also they are more portable than most head phones, pretty comfortable, and they use a single cable rather than a y-cable.