I've been following the tutorial triggeru571 posted here: http://wp-types.com/forums/topic/how-to-get-rating-average-from-cred-for-review/ (thank you!) and it seems to be working, but I haven't been able to figure out a way to transform the display of the radio buttons in the CRED form into stars the visitor can select.
I then found the thread here: http://wp-types.com/forums/topic/review-system-how-to-get-average-rating/ where willem talks about using FontAwesome, which seems like a good approach but I think I've got myself in over my head trying to implement that. So far, I'm just using images, but could switch over if someone is willing to post a walk through.
Since it seems several people have been using this approach for star ratings & reviews I thought they might be able share more detailed solutions to this. It would be GREAT if a comprehensive tutorial was posted somewhere. If you do, please note that the function "reviews_total_func ()" in #133791 has an extra _ which throws things off if you copy and paste. It reads "reviews_total__func ()" in the post.