How to Rate a Product
To rate a product, go to the review (click on the product name on the "Reviews" page). Near the bottom of the page you'll find the "User Reviews" section; at the bottom of that section, where it says "Submit a review," you'll see a comment box and a pull-down rating. Select your rating for the product and enter any comments. Your comments and rating will appear along with the review, and your rating will be averaged with all others on the "Reviews" page.
To rate a review you must be a registered user and currently logged in. Links on the review page will guide you in that process.