I like them, but a) I tend to ruin them if I'm ever carting them around (especially if they're paperbacks) and b) I've noticed that when I have a book on my phone, it's much easier to dip into it and read a few paragraphs in the in between moments when I would otherwise open social media or something. With a physical book it's much less likely I'll dig it out of my bag if I'm waiting for the bus for five minutes and my hands are full.