[mousetree]

For coffee beans particularly I don’t think finding the mean of people’s ratings would be useful. For example, I don’t like light roasted beans and might rate them 0/5 while people who love lightly roasted beans might give it a 5. Average it out and you might get 2.5/5 which doesn’t convey much information.

Having different categories could be helpful.

[jrswab]

This is a great thought. I'll have to do some planning around this. Though I'd assume if you don't like light roasts you'd not be buying them and then would have nothing to rate. But trusting the users to not "hate rate" may not be the bust idea.