As others have noted, the tagging, auto flagging, etc. are great, and it provides a decent, cross-platform, web-based interface. Also, you can flexibly configu

As others have noted, the tagging, auto flagging, etc. are great, and it provides a decent, cross-platform, web-based interface. Also, you can flexibly configure how it stores the actual documents. So at the end of the day if you don't like the program, it gracefully degrades to a bunch of PDFs organized into a nice folder hierarchy that's easy to back up.