Advice on long-term use
I can give you my opinion after 4 years of use.
(I've taken the time to analyse everything for you don't tell me otherwise).
The product itself is beautiful, very classy design.
But in use, what a hell!
You should know that I don't wear glasses, but after 2-3 hours on my head it really gets in the way of my ears to the point where it hurts and I have to put it down.
The cable is not detachable! This is a big negative because other headphones in the same range have a detachable cable and I've already had several problems with false contact that I've had to sort out myself (I've been out of warranty since then so it's nothing to do with a problem with LDLC).
The headphones are also quite heavy on the head.
I wouldn't recommend it, for the price you might be better off with Focal or Sennheiser.