- How long have you use it?
I've had four weeks

- What is so special that you like most and least?
Comfortable
Possibility of storage for transport and travel.
Seems strong enough for use
One of the only ones who can bend and fit into a shirt pocket.

- Have you tried many other models before buying it?
Koss PortaPro compared to the (highly rated on this site), better stereo restitution and more transparency, better in the treble, less good in the bass.

- How would you rate the quality / price?
Very good quality / price ratio

- With experience, you do again this choice? ...
To travel it is very good, there is even a model "aircraft" with specific cases minijack flexible.