System: System 76's Meerkat with Linux PopOS Cosmic Alpha7.
Set-up: The screen was simple to get to work. Short learning curve to eliminate flashing while setting up (Use M1 mode). Main difficulty was my setup requires 6-10' long cords to the desktop computer and provided cords are frustratingly short. Pulling out the HDMI from the back of the computer resulted in a detached metal sheath, so unimpressed with cord quality.
Learning the settings:
Pressing the "S" button for 5 sec. saves the screen setting as the default on start up. That is friendly to know.
M1: great all round, and likely the default for most users most of the time. It handles scrolling and even video surprisingly well. Streamed a show on it and it wasn't nearly as bad as I thought, and may well be better on my brain injured neuro-sensitivities than any other screen I've used. Still, not the quality most look to in their entertainment, so a niche solution for a niche challenge.
use the "+" and "-" buttons to adjust contrast, which seems to carry over between modes, not be mode specific.
M2 for any text centric apps that have some grey scale in their light theme. These will flash and wave in M3.
M3 is for text only apps with an e-ink friendly theme, whcih means b/w mostly/only. Obsidian's Minimal theme with e-ink light theme in all white, for instance, is fantastic for writing.
For reference, I'm in Firefox with the eink theme and custom contrast on Reddit writing this in M1 with the second to lowest contrast and it is surprisingly clear.
Initial Summary I've tried too many things that seem positive and then have some "gotcha" that doesn't show for a bit to get too excited; yet I'm excited, as my eyes are relaxed using this, writing on this, and while navigating the flashing that happened while I sorted out the modes durring set-up set me back, I'm better off brain energy wise now than when the monitor arrived three hours ago. That has never happened before and is an excellent sign.
Compared with the Boox Go 10.3 the e-ink with apps and visuals is superior in every way, and it is on a real OS rather than Android. That alone makes a huge difference.
The screen, without color, light, and touch layers to darken it, is the same lightness (different tone) as the ivory paper I prefer to write on pencil to paper. I essentially have a magic paper monitor. Grin.
I look forward to learning to work with an e-ink screen and my sole computer screen.