Really great and app does have highlighting and annotation – Mendeley (PDF Reader) Review

Mendeley is one my most essential research tools. It keeps my paper library sorted and organized, syncs across my computers and iPad, and keeps my notes with them. It's simple to import files, (drag and drop on the desktop version or open with in the ap) and citation info almost always reads In Automatically from the PDFs. It's easy to highlight and make notes in the text or summary notes on the side. Just hold down finger in app to start highlight or add annotation. It integrates with word for writing and reference lists. It is free. Really, what else is there to ask for? This system is great. The desktop version is a bit easier to use than the app, but it is nice to have access when I am on the run to check something or make a quick note.
Review by Ed & Brooke on Mendeley (PDF Reader).