I've been afflicted with a bad case of GAS (the RF gear kind, not the bean burrito kind) lately, and everyone's seemingly positive outlook re: this lens makes it an intriguing target for acquisition. But some sanity has crept into my system, and in reality, this would be a nice "rental" lens for me just to check it out.
Long term, it will probably sit in the closet if I acquired one. I've just never been a fan of the FOV from a 28mm nor am I a big fan of the FOV of a ~42mm FL (the FOV of this lens when mounted on my R-D1S). Even when I shoot the Nikon 17-35mm/2.8 on an FF body, I find that the 28mm FL is my least used.
Obviously, this is just my own world view, and has nothing to do with any lens in particular. So, while this lens may continue to get rave reviews (as did the CV 40mm/1.4), I think I will pass (and no, I don't own the CV 40mm/1.4 either).
Cheers!