I received mine 1 month ago, but spend 3 weeks travelling.
I use it with Chord Mojo DAC/amp and I'm extremely happy.
I think this is probably the best value in full size headphones now.
It's very close to the speaker sound.
It can be used with a very reasonable result with Apple lightning adapter.
I bought an Apache pelican case from Harbor Freight for less than $30 and they fit nicely inside.
I bought also Dekoni AKG K series sheepskin pads, recommended.
Unfortunately, they are a little smaller and can't accommodate the metal rings.
The producer told me that he now offers pads as an upgrade.
I am waiting for THX AAA 789 linear amp to be delivered latter (maybe November) to compare it with Mojo, which, of course, is a portable device.
Don't hesitate and buy it.