I used this awesome extension to develop a 100 question quiz. The quiz was multiple choice and true false. I needed the quiz to automatically show the user his/her score and send an email to the sports commissioner. I had some difficulties setting up the "Score Script" code, however I was assisted by Chris through his website's forum. The testing was setup using Joomla 1.5 and is going strong to date. I have a tutorial on how I did this posted to YouTube and will be updating it soon.
Great support and development! Kudos to Chris!