i post here also my experience with the cinegrey.
Together with my jvc RS46 previously i projected to the white (not clear one) wall.
I've got a living room, all white walls, parquet clear ecc...totally dark but sooo much light from the walls.
My jvc is stunning image of course, contrasts and blacks but i wanted to boost the experience. I use the jvc in low lamp, -12\13 iris, ligtht is not a problem on this model expecially with a 92 inches 203 width and 3,60m far lens\screen.
Everything is respected, lens throw ecc for the cinegrey
First of all arrived the velcro one, which i don't like, it's almost impossible to mount. First reason to ship back (i bought via amazon).
The result are suttning for something and not like for others, for this reason after couple of hours decided to ship back.
Hot spot is minimal, no chance to see it in a normal usage. Uniformity of jvc helps and also the perfect throw distance and not big big screen. Sparkling zero.
Contrast is boosted, black is ultra black now, contrast is superb and in some point seems really an oled (with better colors in my opinion). Total black screen with a center white figure is stunning. Colors very nice.
Birghtness is much lower...this is no chance to be a 1.2 gain, more likely 0,8 and 0,5 on the sides....I put it just below my wall to see the differences and in a sunnt day one was sunny (probably even too much) and with the screen is cloudy...that feeling i hate.
The white point is very good.
Overall probably will see for the 5D even that is not really a 1.5 but surely is better. And will see...
For me does not worth the 500 euros, i mean i wouldn't pay that for it.
totally i would say native contrast of my jvc on wall is 8\10, on screen 10\10. Birghntess 8\10 wall and 4-5/10 on screen.
I didnt' get what is difference a part of gain from 5D...i mean...300 euros more is huge. Probably will try and send it back again even the 5D