See my Fujifilm GFX wish list.
Mostly from those having bought and using the GFX.
I think these perspectives, which are their own and not mine, are particularly valuable in their own right, particularly with my responses to them.
Update March 9th (in the link above): additional reader comment added. The sum total conversation is a review in itself, supported by what I have documented, with more of that documentation to come.
Update 11 March (in the link above): Michael Erlewine explains his final conclusions in a bit more specificity regarding the Fujifilm GFX vs Nikon D810 at ISO 64, and his large collection of APO lenses (scroll down to end of Michael’s comments).
I suggest reading my initial experience report after the above:
My report is far from complete; this is a new system and a new camera system like this has many aspects to cover. So far I’ve been disappointed in some ways, but there is a lot more to cover and the GFX will get the good and the bad covered.