HIFIMAN Edition XS

First, it took 11 days to arrive with UPS from Germany to Portugal.

Criticism is it does sound a tad, tiny bit, too sharp maybe, only in some songs that are high heavy.
Comfort wise there's nothing to be said, it's perfection made into a headphone, it's big, does not touch the ears inside, it's light enough not to bother.
It sounds wide and open, big and articulate, punchy to the border of sounding intolerable of how punchy it sounds, again, just like many reviews say.
Separation is great, anything more than this is just pure luxury: you won't miss it in most use cases.

Bottom line, it can give you many full time moments of pleasure listening to your favorite albuns. In a similar price brackedt, I have a Sennheiser 660s (the older one), and a Byer DT 1990 p (because I'm a dumbo who buys this stuff for no reason :/ ) and so can only compare those two, and yes, just go with this one, not much to compare sound wise; this headphone is nothing crazy mind you, but while costing the same as those, it's just ahead in all fronts (like, "ahead" ahead), to the point where it makes me sound like I'm pandering to it (see, I'm aware of how this review sounds XD), it's just damn good... how can I put it... well, "it makes you start singing with the music", let's just say that.
Surprisingly hard to drive, so... good luck with that, I'd say we all agree no one likes spending on amps, but it is what it is. Enjoyable on most power sources though, so not something to fret about (Though it does not go very loud on a normal cellphone jack, or tiny amps).

Can't talk about durability because I just got it.
Build: it's ok, I don't really care much about that unless its very bad, and it's not bad, it's ok.
Have fun.

The bass is rich, mildly elevated. The sub bass is real. Great for EDM.
Mids are somewhat recessed but present.
The treble is way too much for my taste. The sibilance is real and they hurt my ears.
In many tracks the guitars and cymbals are louder than the vocals.
I had to return them but I appreciate them.
To the trebleheads who want massive soundstage and an engaging beautiful hifi sound, take these.
Not for the studio. The sound is too decorated. Luxuriously so, but not studio signature.