E-ink is just genuinely incredible. As you said it looks like paper which is nice, including needing an external light to be read at all lol. Feels easier on the eyes than a phone.

They use no power at all except during page turns, so battery life lasts for like a month.

Screen is much larger than a phone and the device is also a lighter weight. I find it more comfortable to read for longer sessions.

Overall they’re just nice. That being said mine was a gift, I’m not sure if I would get another one tbh. I usually just read physical books still lol