this app Is THE reason I bought an ipad - so that I could organize all of my research material in one location! I now have what would be an entire box of papers at my fingertips where ever I go and ready whenever I need them. Just like a printed page, I can Highlight and make notes, but unlike a printed page, I can can do searches and even save and search bookmarks. My favorite feature is that I can save and email my highlights as a summary of an article!