Its free and easy to use. Recently it has been collaborating with Elsevier to improve the product. The software has both online and desktop application. It is extremely easy to use. You can just drag and drop files to get the necessary references. You can even use the online reference import tool. To directly extract the necessary reference from a webpage. It also has an inbuilt pdf reader where you can read and annotate stuff. Review collected by and hosted on G2.com.
It sometimes makes errors while extracting the references and sometimes makes errors while building the bibliography. The web importer requires you to sign-in everytime you start the browser. Review collected by and hosted on G2.com.
