Got mine in and first off, in a nutshell, these are a wireless marvel and achievement for headphones.
I'm mainly posting to share my thoughts on wireless SQ vs wired SQ. I have the Apple lightning to 3.5 adapter cable as well. Listening to Blinding Lights and In Your Eyes by The Weeknd.
Wireless - as many others posted, good...no, great soundstage. Highs have good sparkle and sonics are very clean. Mids are a bit recessed. Lows are very clean and more accurate than boomy, but still fairly bassy. There is a definite digital formula to the sound overall, but it's so well done and I am having a hard time realizing this is wireless audio. So damn well done.
Wired to a Dragonfly, Tidal MQA - More sparkle, crispier sibilance, and more separation. Dare I say even wider soundstage? Highs and lows have a tad more attack and are a bit tighter. Now here's the interesting part. The mids have come out of hiding and have joined the highs/lows, although still standing a tad behind the highs and lows. Overall, the sound signature sounds more balanced, is a little brighter and clarity steps up a couple of levels. Wired makes the wireless sound sig seem darker and smoother, while wired is more analytical with cleaner separation and mids more present.
Negs: for what they are, SQ is incredible overall, yet lows and bass punch could be a little tighter (though very very very good still!).
Overall, on this first impression, I'm lovestruck. Get them if you still can if you want the best wireless experience, imo