My previous screen was an 80" Carada with a 1.0 gain material using an Epson 8350. For the price and for the bedroom it was a great combination of bang for the buck. You can get better black level performance but the 8350 is such a killer picture for the price. I decided to go even bigger, basically taking almost the entire wall that faces the bed...definitely too large it's almost a 1:1 ratio of screen width to viewing distance...but we wanted maximum effect and zooming the projector out was just too much fun seeing it huge so we went for the larger screen.
Some early thoughts:
1: Hotspotting - compared to the flat white Carada which had almost unlimited viewing angle, the viewing cone of the BD 0.8 is much more narrow. While in bed it's perfect, moving outside of the tight area shows vignetting on the far side of the screen and in the extreme corners. It doesn't matter while watching straight on but something to consider if you need a wide angle of viewing. You will also notice when viewing straight on there is still some vignetting...if any of you are photographers it's kind of like what happens when you shoot wide open with a wide angle lens, you will get some vignetting in the corners. This also might be a function of sitting so close to the screen.
2: How black is it? - this is a hard question to answer because it depends on the kind of light hitting the surface, I mean, it's a screen meant to reflect light back outward. In neutral indirect light the .8 material looks to be about one shade brighter than black. It's dark, but not 100% black. More like...very dark grey. Depending on the amount of ambient light in the room you will see varying levels of absolute black on the screen. Attached pictures show mid day during the brightest it is with the blinds closed.
3: Does it lower the ultimate black level of your projector? - slightly, at least in my application there is still too much reflected light in the room even when pitch black to lower the black levels as compared to my old screen. The absolute black levels seem similar when using dynamic iris and the projector is showing a dark star field. Meaning: in my room, the Epson 8350 when showing a field of black has a similar brightness level on my BD screen as it did when I had my Carada 1.0. I've already packed and sold my old screen but had them up side by side to test and they looked almost identical with black showing on the projector. The 8350 has pretty good black levels so this was not an issue for me. Again to clarify I am talking about the darkest image level in a dark room. This shouldn't be any surprise the screen has a lower gain but it is still reflecting what the projector is spitting out.
4: Can I still see the bars? - yes. Absolutely even at night and all the lights are out using the .8 screen I can still see the bars when viewing a 2:35 image on my 16:9 screen. The black of the frame is darker than the black on the screen. Your application might be different, but I have a small room with white walls and silver metallic blinds. The bars do not "vanish" like you see on the videos online - they may in your room but not in mine. However, there is a substantial improvement from before and it is plainly obvious the amount of reflected light is vastly improved from before. So yes I can see the bars but they are much darker than before, and they stay dark even when the lights are on.
5: Worth it? - 100% YES. I am pretty astounded at the performance of this screen for my intended purposes: which is to watch a gigantic TV at all times of day with or without the lights on. Football season is particularly hard for me because we do not have "regular" tv's, just 3 projectors in various rooms all with the same issue of not being able to watch anything unless it is dark outside. This screen excels during the daytime, and especially at dusk when there is still light in the room or when you have the lights on - it's pretty astounding actually. If you have man cave with total light control you are better off getting a flatter image with a white matte screen and even gain. I don't have that situation so this is the best alternative.
6: What does it look like during the day? - I've attached pictures here that I just took of my bedroom and pretty much exactly what I see by eye. It is the worst case scenario...bright high noon light hitting the windows spilling onto half of the screen. All images are constant settings, EXIF data is retained if you want to have a look, untouched except processing jpeg from RAW. Remember this is with a $950 Epson projector. I've placed two white sheets of paper so you can see what the screen would have looked like before and to show what kind of dynamic range you can get during the very bright times of day. I've also shown different kinds of content so you can see 2.4:1, 16:9, bright, dark etc. This is being served by an HDI Dune Smart H1 media player (which I highly recommend). The projector in the living room is shooting onto a Stewart Grewhawk which works well in the evenings but it's black levels do not compare during the day.