Very good quality listening. Solid. Practice.

Although the price is a bit high, it's worth it to force a little, very beyond what is found in the low range.
Sound quality normal. The words "system LiveBass etc ..." is a little scary, but no, it's just marketing to con, the sound is normal.
The braided cable seems, not the plastic kind stupid. So, it does not tend to twist (and I assume to harden). It is not big so far, I would say 10% more than the usual standard - negligible.
The connections seem very serious, it should take a long time (in my experience with other headphones of the same brand and lower range which held for years - but I'm careful).
On the split portion of the cable, there is a sliding separator that allows to position the lengths or coerce a little better cable of the distance caught the atria in the ears.
Keeping headsets: for me it's okay. For you ???
The tip of the jack is thin enough to easily get into the female connector of a Samrtphone, even protected by a shell (Galaxy Note). Same for the Doubling Jacks.
Setting effective volume.