I think the thing that I like most about my recently purchased (well, hell! I've had them for about three months - long enough to assess them.) Sony headphones is that they can actually get fairly loud and still sound good. That's quite a tall order in my book.
I have several sets of professional headphones which will rip your head off with ultra-clean exceedingly high volume if you want, but they all have a clinical, alcohol-in-the-doctors-office, diamond-edge, flat-water sound to them, which, backed up by a about three generations of scientists in the industry, is necessary for studio work.
These "consumer grade" Sony wireless 'phones have a musical voice built-in that is pleasing and even when pushed, that musical voice remains pleasing over a long period of time.
Never before imagined I would say such a thing about a Sony product which was not designed as a blade to wear against the very barriers of our latest technological advancements. These are fucking headphones for chrissakes and they are well-built and cleverly timbered.!?!.