Use Mendeley

I recently started using Mendeley and found it useful for managing and accessing the PDF documents from anywhere. I found that I can :
1) can install it to several different computers
2) can manage the docs from different computers, or interenet
3) to share pdf files with others
4) to create the references in the format of bibtex, which would hopefully save some time (to explore more)
5) to add commentaries on the PDF docs
6) to synchronise the pdf docs between PC and my account on Mendely