I quite like the ebooks on the iPad, I think they work very well.
What I do is use the paper copies of Schweser and the ebooks of the curriculum. I tend to study from the Schweser books, and the refer to the curriculum ebooks to work through the EOC questions, or refer to if there’s something I haven’t quite grasped and need to go into in more depth.
Plus I always have my iPad or iPhone with me, so even if I’m somewhere without my Schweser book, I can still get a little extra revision done with the ebooks. Having both reduces the amount of dead time dramatically.