My Kindle is significantly lighter than my phone which makes it easier to hold for long stretches. The screen is bigger and I can render the text a little larger without sacrificing too much.The screen doesn’t produce light on it’s own which reduces eyestrain. My Kindle has a warm nightlight which I hope helps me sleep better. The page turn buttons are better placed than the volume buttons

I’ve read for hundreds and hundreds of hours on both phone and Kindle and the Kindle is absolutely worth the cost for me (once it’s hacked). I hope there are better and more open options available when it finally dies.