I'd like to share with you another new module. It helps you to manage user ratings for pages in a very simple way.
You can add a user rating to a certain page with a line of code:
If the user is logged in, the module remembers which page the user has rated for. For non-logged-in visitors, the module stores the pages, the user has rated, in the session.
You can get a page's rating and its total amount of votes in a similar way: