Yes, I do believe that EndNote Web is my bibliographic tool of choice. Not only is the web interface easy to use — I find that creating groups of citations on the fly is quicker than other tools — but the plugin for Microsoft Word syncs seamlessly to the citations in my online account.
The plugin allows for searching your list of citations nd inserting directly into the document as you write. You also can change the reference format should you have a change of heart. For example, I was formatting in my usual APA style and realized I needed to switch to Vancouver. Even after I had imported my references in APA, I was able to make the change.
I’m not sure how I lived without Endnote while in undergrad as a Psychology major, but I could’ve saved hours and my sanity by using this tool instead of a Word document I had to continually email to myself from which to copy and paste references.