How long have you been using?

2 years

What is so special that you like most and least?

The isolation from outside noise, its sound and its linearity,
Comfort and rugged durability.

Did you try many other models before buying it?

Audiotechnica, Sony, Sennheiser, Shure ...
This is my favorite.

How do you rate the quality / price?

A bit expensive but the quality is undeniable

With experience, you do again this choice? ...

Yes, yes and yes