I've had mine since last Wednesday, they are truly incredible. Haven't used them enough to notice any major sound changes or burn in effect but straight out of the box they are awesome.
I never even auditioned them before i bought them either, I just jumped in and haven't looked back.
Keep in mind I'm waiting for my Ether Flows and AEONs to arive as well so I have nothing to compare them to at this point apart from saying my initial impressions are the sound is clean and crisp with great bass, their light as a feather and very comfortable yet feel sturdy and you know it's a quality product when your holding them. I don't find the trebble to bright either so no fatigue at all and thats after very long gaming sessions on my pc and music listening.
I currently have them paired with a chord mojo which drives them amazingly well, but honestly these things do not at all seem to be hard to drive like others have said so I'm not sure what rubbish dac/amp combos their using but any dac/amp over a couple of hundred dollars will drive these well enough.
My old schiit uber stack drove these easy as well lol.
Anyway just my thoughts.
Highly recommend, quality product that will last you years and give you a very comfortable, fatigue free and fantastic listening experience for years to come.
Just get them already. Haha