I'm looking forward to seeing some reviews of this from reliable people. I love my FX30, which I combine with an A6600 as B-cam. The drawback there is that the RS on the A6600 is absolutely atrocious - especially, for some reason, with non-native lenses. I actually only have 2 Sony lenses, neither of them particularly amazing.
At this low price, I could sell both my Sony cameras, both Sony lenses, my CF Express cards and the top-handle audio thingy - buy 2 of these and whatever EF-RF adapter they come out with and probably still have a bunch of money left over to spend in the pub!
So - awaiting proper tests of DR, RS and stab more generally.
(I've considered doing the same with the Fuji XM-5, but the lack of stab and their rarity have led to me deciding against).