Link to Rhapsody's product review of Valerian root here:
Clickety-click
(Hope you don't mind Rhapsody, but I remember the advice you gave me when I was considering it!)
.... here's also a link to the post I made asking about St. Johns Wort and Valerian Root.
Click here!!
.... My review? I liked it. I've used it a couple of times, it's made me dizzy before sleeping but not as bad as taking Gravol to sleep (an anti-nauseant that you can use to sleep). It does smell really bad, and it's not a nice colour... but it so entirely works!
(I've never used it for anxiety specifically... but for sleeping and calming you down before you can sleep - it works wonders!)