My greatest purchase of the last decade I reckon. I first tried them 9 years ago and since then I am onto my 6th pair, no because they break easily but simply because I use them for between 8 and 10 hours every single day.
I do a lot of running and cycling and they allow me to be aware of idiots in cars whilst being able to listen to music or books whilst I ride / run. I use them at work with ear defense in so I can still hear what my machine is doing.
They are light, comfortable and really just the best way to listen to stuff for me.