I bought this as my summer project -- basically, 'Steve, let's retrain your brain to focus on long form reading again.'
What I like about an ereader / eink is that its not some flashy screen with a bunch of stuff going on in the background like an iPad or whatever. The screens look great and have an amazing refresh rate these days.
The Libra is a 7" screen, which I figured should be good enough to read PDF'd magazines in landscape -- and I was right [1]! This uses KOReader [2]. While the images themselves aren't the same as a color magazine/screen, it's good enough. For epubs everything is exactly as you'd expect.
With my own ADHD, the initial get-down-to-reading is tough, but I've noticed that it is getting easier with each session. And it is also getting to the point where I am looking forward to reading.
[1] https://i.imgur.com/9hncMyI.jpg
[2] https://www.mobileread.com/forums/showthread.php?t=295612