I think there is a big difference between text that you would want to take notes along side of the text and those books that are a more casual read.
For note taking, e-readers have still not perfected the ease of having a pen and being about to write directly on on in the margins of text. Print books still excel there.
But for casual reading, a device like a kindle paper-white is better in almost all regards. Reading at night off of its adjustable lit screen is perfect for not keeping you awake if you are trying to get to sleep. 90% of people that I have suggested one to have enjoyed it.