This plugin is the best i have found for quizzes.
But the only thing that i found missing is in case of large quizzes the quiz taker should have the ability to navigate through the quiz. They should have some navigation to go to a specific question directly.
Also the quiz taker should have the option to mark the question to review it at the end.
AND PLEASE ENABLE TIME LIMITED QUIZZES
Hope you guys can work around these things.
Anyway very good work done. Thanks guys for your work.