How long have you use it?

About 3 years.

Have you tried many other models before buying it?

Just a headphone stanton first prize. Not really what I used as a reference, this is my first Pioneer high-end headphones.

What is so special that you like most and least?

More:

-Very good sound quality, there is not much to blame aside.
Isole-well enough ambient noise
-Maneuverability

Cons:

-Too fragile! Especially in headphones. I do not even count how many times I had to pick up.
-The quality of the "leather" headsets that takes time.

How would you rate the quality / price? With experience, you do again this choice? ...

At the time the value for money was not so good given the fragility of the product (paid over 200 euro).
Fortunately, the sound quality is second to none and always a good time.

I do not know if I would do this choice, I will buy more of a HDJ 2000 entry.