The example reviews were idiotic, and clearly served no useful purpouse. Numeric user ratings which then form an average are a bad idea : the only benefit they have is that they prevent bad official reviewers from wreaking havoc, but this can be prevented by simply not signing up bad reviewers, and the dangers far outweigh this : they are open to abuse and generally speaking distort the picture. User comments are an excellent idea, but forming an aggregate rating is dangerous.