I looked at Kindle first. Good results for Steinbeck and the Brontes. Project Gutenberg was appealing in the manner the book enteries were entered and I was able to track down old favourites, School for Scandal, Sheridan and the Diaries of Samuel Pepys. I found librivox rather complicated to find my way around.
The fact that some of the older classics can be hard locate now unless you have access to special libraries makes the e-books a worthwhile addition to publishing and I can see an advantage to library patrons if this format became part of library collections. But please, not at the expense of a the paper copies. Not everybody wants to read from a screen.