How do cause star ratings work?

As part of closing off a project and giving your feedback as an Angel, you will be asked to rate the Cause you supported out of 5 stars. This rating is important in order to give recognition to the Cause and make them feel as they though they were great to work with. 

The Cause star rating is equivalent to: 

1) I found it very difficult to work with the Cause and finish the project
2) The experience of working with this Cause could be improved
3) I had a reasonably good experience working with this Cause
4) I had a positive experience working with this Cause
5) I had an amazing and efficient experience working with this Cause