I was surprised when I tried the reader the first time on the Note3(ok, its not exactly a small device) . It was very comfortably readable, of course being able to resize the text makes things easier.
Forgot to mention, that the books sync across all devices. So that means you can read on the puter at home, and pick up where you left off on the phone/tablet while commuting. Of course, syncing wont work while flying cos we all go to plane mode dont we