Ok, now I can tell that my mind is blown away by the shear amount of details being thrown around in the air, by the number of layers of the sound (tell me about coherency, but I never cared about that honestly) and by not being tiring. I can really focus on one particular quasi-source of sound and track it down during the duration of the sound as a separate thing! It is as you could divide the sound signal into the separate signals for each instrument/vocal.
This impression was immediate while listening to very good mastering of Rumours by Fleetwood Mac (w.g Don’t Stop). I felt bombarded with different parts of the sound that I never heard before while knowing this recording forever. This is simply amazing and truly Unique. I am afraid to go back to S12 and Tea now…
But.
MEST are truly extremely fit/tip and probably source and file dependant. It changes the signature like a chameleon from great, but not 1k $ great to really outstanding being worth all the money IMO.
The next thing which is more of a lesson learned to me - I expected being mind blown by them immediately when pushed in ear. That was not the case for whole day when I was listening casually while being at work. I was afraid that I got taken away by some random hype train… But in the evening I sat down, closed my eyes and started to listen consciously. And then I realized how much it is in this set! Long story short - for casual listening just KZ CRN would be good enough. It is only if you care and have time that it makes sense to buy more expensive stuff like that in my current view.
Do I have that much time though?