OK, got it in and even my wife helped me unpack (a first), as she knows I was excited.

PROS:

Nice looking board
Great screen
Good enough navigation
Speakers are excellent

CONS:

In now way does it offer the power of my 3x (I am mixing both through my mixer with flat setting)
Less style categories
No fill buttons / auto fill is quirky (again)
Some great styles from the 3X are gone, or reworked, not to my liking
Sounds boxy to my ears

These are my first thoughts and I took a break after 3 hours. I;ll head back later and try to forget about the 3X in comparison.

At this moment, I would dump it for another 3X or a 4X 61 key, but afraid I might not like the 4X either.

A bit disappointed and a bit down...... more later
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Live: Korg PA4X/Zed 6FX/EV Everse 8s/Senn 935/K&M stand

Studio: Korg PA4X/Yamaha DGX670/Yamaha PSR SX900/Boss BR900CD/Tascam DP24SD/MTM Iloud/Senn 935/K&M stand/Shure SM57/Sony C80 (2)/Blue Encore 300