I bought these headphones there is more than one year at the Berlin Marathon in September 2011. I use these headphones since. For sport, but not only, far from it! In fact I use it all the time. And I find really impressive quality !! The headphones I was using before did not take more than two or three months (big max), especially when we know that sweat is bad for these kinds of devices. But then ... it do more than a year since I use it daily for any type of activity and they still hold water.
Not to mention the price ... 15 euros. We are far prices Ipod earphones (real scam!).
And the sound quality is far from bad. This is not what is more accurate but the bass enhancement allows listening very, very correct. The semi intra allows a very good insulation, it even happens in an airplane.
I'm about to buy a second pair. One bought there more than a year is still usable, but it remains for me one of the tips (a total of 8 it seems to me, even! When). I did not hesitate for a moment to come back to this.
Philips hat!