I really love FR as a research tool. This gives many facets to a search. The add-on keywords are great. A person can basically add his own keywords to an article- personal words- and the article will essentially function as a form of bookmark for that freeper. (Look at some of Mia T's articles) I'm hoping one day to see a search function that allows a freeper to search by the journalist's name (useful for demonstrating bias on a reporter's part) and by publication (ie search for all CNN or Telegraph articles).
FR rocks. You really get your money's worth here.