Upload & Sell: On
Quick update on this, I have received S-type Focus screen. The screen arrive in 4 days after it shipped, and it took 3 days after my order to ship. I guess they were building it after take orders.
It took me about 5 min to install it since I have the experience installing Kaytzeye for my D300s before. But found it seriously back focus, I put the plastic shimmers come with it, it turns out two is too much, and one is dead on. I use MP50 to check focus, highly recommend using a micro lens, so put your test target closeby to use thin DOF to check focus, you can see it in eyes clearly and take the shot, compare, adjust, take the shot, and compare again, done. (Hint, don't use metal tweezers when put screen in, I did that, and leave some marks on the small tab on focus screen. It seems extremely soft.)
Now I can see the changes in viewfinder light in half stop in aperture up to F1.2. And DOF is almost match what I see if I took wide open shot, which I like it very much. The viewfinder lightness is almost the same as D700 stock one, or might a little bit of lighter from what I see through f1.4 lens. Not sure about this, as I don't want put old one back to compare again.
For Manual focus, This will speed up my shooting for sure, but it won't improve my keeper rate most of time unless my target are close by (I can think of using 35mm 1.4 for portrait will be really helpful), it turns out focused in viewfinder not guarantee you will see a dead on focus on screen 100%. So this will only improve my speed to get accept shot once needed, but won't help me in critical sharp focus, unless it is a macro. (But in that case, even stock one may works as well)
Do I like it and recommend to FMer here? It really up to you after reading my impression. For me, I like it better than Kaytzeye, it worth every penny asked. I for sure will get one for my D800 as well when time comes