Convenient to have all books in one app, but it crashes too often, and to turn the pages is a pain. Besides , the books are exactly the same they have in their website (and others since the copyrights have expire for all those books) for FREE. It is better to download only the books you want from their website, open them in iBooks and delete them when you finish, so you free some space in your iPad. Two stars for the title selection.
Gandalf5011 about Top 80 Classic Books - The free collection of the 80 best classics of all the time