The headphones were recently named in the magazine "Runner's World" in a series of tests to headphones for running as Teststsieger. And rightly so. The sound is very good, by the in-ear solution be ambient noise surprisingly well damped (Warning on roads!). The adjustable brackets allow a perfect fit in the ear, no slipping or falling out. Initially eventually took a few acclimatization runs, the headphones sit quite tight in the ear.
For the price a top product - higher quality sound delivery costs many times over.
Practically would be at least one volume control. But in combination with the iPod shuffle was not really missing it.