One of my favorite websites, is Rottentomatoes.com. I usually try to hit them every Friday. Since most new movies are introduced on Friday's, (unless it's during the summer and around Christmas, when they release some movies on Wednesday), they are a good source to hit for movie reviews. Their rating system is either rotten or fresh. What they do is grab all the movie critic reviews and from that, rate each movie. They use a Tomatometer. From their site: "In order for a movie to receive an overall rating of FRESH, the reading on the Tomatometer for that movie must be at least 60%. Otherwise, it is ROTTEN." So, before you spend your $8.00, I recommend you check out their site. Anyway, movies that are fresh will have a little red tomato icon next to it's name.
And ones that are rated rotten, will have a little green splat icon. 