Thanks for sharing!
Be aware that some E-ink devices do not solve any of the problems. Yota2 E-ink side was the only phone I could use almost without any consequences. Since it is unusable in day to day activities (too slow, lags, hangs randomly) I bought Hisense a2 pro. It is a life saver (since nothing works for me), but still it gives me some problems on the right eye, but they do not last more than couple of hours.
As I cannot find any other solutions, I do not really care about the design, color, form, etc. I just need any way to work, communicate and be able to somehow keep earning for the living. Due to this I am more than willing to keep buying e-ink devices to find more comfortable ones, so all these shares are very very welcome! Thanks again!