10 years, I love her, comfort and the fact that everything is repairable.

after having (no longer) a HD25, which I "killed" the head and ears, physically ....

I have no regret my purchase (x2) for this model, I also own a K280 (see my gear)

use record, mix, or being with my students.

comfort is almost perfect for me, if we replace the original earphones faux leather glue and crackled, with velvet models. bcp more comfortable, no more sweating, and it does not disintegrate over time.

good build quality, detachable mini xlr, look good (akg what)

I have two, and I made the same mods on 2. namely, as I said above, velor windscreen and new set of foam on the transducers. and there is comfort assured.

Very good sound level, actually, maybe a slight tendency to "flatter" the bass.