While much of what is ventured isn't desirable, everything listed is pretty much as would be expected.
In the striving to acquire a truly Black surface, one with gain, the combination of a highly reflective substrate, a darker overlay, and a diffuser has to balance all factors "exactly". The degree of applied gain required to offset the attenuation of a black surface makes achieving such a Balance extremely difficult, and expensive....and all too often compromises still must be accepted.
When the above involves a true Mfg process, many times the choices are limited as to how to do so, and with what specific materials. Add to that a new Start-up Developer's own restrictions, (...creating such a "Mfg" product that would remain affordable...)
and unbiased reports by actual end users are critical.....and sometimes quite telling.
And, throughout Robert's efforts, it was / is exactly that drive toward an almost "Black" surface, one that likens unto a LED TV when off, that has been the chief hurdle to mount, and has caused the requirement of such excessive gain to offset that very darkness.
So here we have a review that pretty much replicates every deleterious and undesirable aspect of virtually all such Mfg screens that use surface gain to offset Blackness instead of the Projector's lumen output. And when one also combines relatively high Lumen output with Retro Reflective tendencies, every issue above is compounded.
Myself, and for many, many others, the idea of having substantial acreage on a wall look like a light-less void seems counterproductive to true esthetics. In a Family room environ (...where of course it is most needed...) the Significant Other usually laments the appearance. In a Theater, unless such a surface is almost solely intended to increase "off the Screen" contrast, or combat the close proximity of reflective surfaces...or both, it (...Blackness...) seems overly redundant.
But I also can both understand and relate to those whose primary desire is to have something that elicits wonder from one's Peers, and large Black surfaces that suddenly light up like a LED TV certainly fits that premise.
As such....many owners of such can and do accept most of the above caveats. Frankly speaking, seeing such a thorough and comprehensive review is the exception rather than the rule, because a great many folks don't want to post about "mistakes' in choices....and the more expensive the choice, the less likely the effort will be considered.
does a great many a distinct and valuable service by "telling it as it is", as well as describing as to why he finds that despite the drawbacks, he does not wholly regret his purchase. What that means is that people have both sides of the picture to make effective judgements by.
And perhaps best of all, at the point / level Robert is in this Venture, such reviews can prompt a rethinking of design and process that might result in noticeable improvements. Knowing Robert....that is exactly what I would expect.
He's not the type to "settle" for less than optimal results.
Taking things congenially further, I am posting below two images of a Silver Fire screen of approx N8.5 shade and a Gain factor of approx. 1.3. It's simply a metallic infused translucent paint sprayed upon White primed Drywall. It's reflective particles are extremely fine grained, and are embedded at various degrees of angle within the multiple layered coat, which itself uses the underlying pure white surface to capture absorbed light and retain / return it into the initial darker reflective surface.
The first one was taken with two 80 watt Floods washing each corner of the screen. Note the "white" border around the Screen. That is the White Primed wall area that remained when the 2" Blue tape was removed. No Trim was as of yet applied.
The Second image has the Front Floods turned off, but the Rear Floods ( @ 12' from the screen ) remain on.
If a Black Screen surface is the primary goal, certainly what is shown above isn't what matches. Just the same, almost identical performance is achieved with surfaces painted with SF where the shade of Gray approaches N5.0 and gain is approx. 0.9
......and a N5.0 surface is pretty darn Dark Gray.
But...it's not Black, so there is that to consider.