So, I used this plugin on my personal theme, and there's only a little problem.
The rate is only on single post pages. Well, I customized the css of the class .rw-right, so I could put the plugin on a place more suitable.
Then, when I vote and I'm logged out, it works perfectly.
But when I try to vote and I'm logged in it makes the labels like "good", "bad", etc appears in front of the stars, difficulting the vote. I searched the error that was causing it, and appears that it's because the plugin uses "position:absolute" for positioning the labels, and that's imputed automaticaly. But when I'm logged there's a admin bar right on the top of the site, and that had makes the whole site move down, and break the "position:absolute" atribute. =/