I will start off by saying this is a fantastic component. 

I have a few issues though:

Certificates:

1. Certificates are slow to generate- it would be nice if they could generate in the background after the quiz with delaying the processing or have a pop-up noting that it will take time to generate.
2.  After modifying the code for the PDF views, I can not remove the Header.
3. Need the ability to turn off "Powered by", it looks very unprofessional to have that on the student certificates.
4. Need the ability to generate landscape certificates. After changing the php files and deleting the stored pdf, it is still portrait. 

Results report

• The stars ranking do not show on most views and reports, mostly shows a drop-down with "1".
• Need to batch download PDF reports of all quizzes into a single downloadable report.
• The student view of the results showing the correct and incorrect answers shows the check box as the same color. It would be nice if the wrong answer and the correct answer had the ability to be more clear such as green check mark and red X, or something similar. 

Quizes:

1. The option to retake only missed questions instead of the whole test again for a single quiz
2. Saving a copy of the test (duplicating), does not copy the questions. That would be very useful. 

Student results page:

1. Need the ability to hide/disable "results" column to prevent downloading PDF to prevent the test questions from being circulated on-line. 
2. Need the ability to hide/disable the "certificates" column if a certificate is not enabled

Student final result

1. When showing correct and incorrect questions, the test question number does not show. It should show so that instructors can go over the test questions after. This is especially useful when only showing the incorrect/missed answers. 
2. The final results column is confusing and should have the option to hide it.