I haven't been keeping track of times for an accurate timeline, but I'll just make up some
I bought a Mits HC3800. This is my first PJ. I previously had a 50" Panasonic Plasma (well its being neglected behind the screen). I started building the 1x4 frame and knew I was going to put up some BOC and then decide where to go from there. It allowed me to use either, BOC, Kilz or any paint mixture you can imagine.
Black Out Cloth
I can't really review the BOC so much because I was so impressed with the projector. I think I watched 2-3 movies on it for a total of about 12 hours. Unfortunetly my HTPC Blu-ray was terribly mis-calibrated, but I did not know it yet. The cable box was working fine.
I then decided I wanted to go with the Elektra N8 and primed the BOC with Kilz to get ready for it. I had the Kilz up for another 5 days or so with another 10 hours. This is when I started noticed two things: The "black" bars at the top were illuminated way too much. This is when I decided that needed to be improved. Forget color accuracy, brightness, viewing at angles, etc, those are all minor compared to this. Even though I was watching in total darkness, the white ceiling still reflected enough light to need the gray screen. I also started suspecting something wrong with the Blu-ray HTPC, but ignored it.
I didn't have the most shocking experience the first time I went to this screen. In fact, this is when I really noticed the HTPC was screwed up. We watched a very dark movie and even dark grays were just clipped to black. I got more annoyed with trying to find out what the problem was, than to be excited about the new screen. One thing was clear. Black was now BLACK. This was immediatly apparent, and I was pretty suprised how much improved it really was. This was me experiencing it first hand what I've been reading for weeks.
One thing I should point out is with the BOC and Kilz I could really see the outline of the black bars image. With the new Elektra N8 screen, you can't. It almost blends and was questioning whether I still even need the black velvet frame. If you go up closely you can see it, but its not noticable at normal viewing distance.
Once I finally fixed this, I was excited again. BTW, my HTPC was set to 0-255 instead of 16-235 output. Not sure why that screwed things up, but I couldn't even see 6% gray. Things looks great, and the colors are extremely vibrant. Star Trek looked amazing. The PJ is extremely sharp and I'm truly impressed. Everyone that comes over, talks about how clear it is and how vibrant the colors are. There are truly impressed (and jeolous).
I don't even have any problems with the 6 recessed lights I have. I have some shades that can block out most of the sunlight, which is more than adequate for general viewing.
Not sure what you were looking for, but hopefully I answered it?