I did some searching for a Quiz component for a while. Found the Delux version of this, it is well worth the money. Plus the support you get puts many "support desks" to shame.
The different types of questions helps to keep the quiz look different from quiz to quiz.

If your site is in any language that contains characters other than Latin, forget it. Most of the actions that can be taken after the quiz will not work. There is not much you can do about it. Problems will arise from anywhere.

But even if your site is based on Latin characters, I am sure that you will find the whole thing too un-friendly and ugly. It comes with 2 templates which they can be rated as bad and even worse. If you are not a really experienced PHP user and ready to dig through code to fix the simplest thing, don't bother.

I have also noticed some incompatibilities with certain Joomla templates causing more problems.

After sales service is poor to non-existent. After 48 hours of asking for help in their forum and via email, I was totally ignored so I had to launch the quiz with serious drawbacks and aesthetic errors.

For my site this component is a very good solution. I had to make several quizzes with sound in it and had to spend a lot of time creating quizzes on their demo site trying to make it working. At the end I wrote a request in their support and they created the question with the code inside the question. They even stopped reseting of their demo site for me for one day.
Elearningforce helped me a lot and I'm very satisfied of the job they done.

I run a language learning site and this is a core component of it. It's pretty easy to get it functionally running, but some template adjustments are needed for a professional look and to remove excessive branding from the creator.

Pros:
-Easy to manage quizzes, questions, and categories, and to move items between them.
-Nice selection of different question types.
-Detailed reports sortable by user or quiz, with .csv downloads possible.
-All the features you need to publish quizzes from the backend.
-Only minor "Cons" are visible to the user
-The developer loves to hear feedback for future development and new versions are free or discounted depending on what the upgrades are.

Cons:
-Hard to manage large numbers of quizzes in regards to making them available to users. The process is make the quiz, make a component link in a menu to the quiz component, go back to the quiz component and link the quiz to the menu item. Then if the Joomla menu isn't the best format, you have to copy the URL and make the links in a content item. When you want to assign modules to specific menus, you have to wade through all your quizzes. If you want a module displayed on your quiz pages, you must assign it to each individual quiz.
-Each question is a page. In between each question, it says if you were right or not. The load time is a little slow and it gets annoying anyway in big quizzes. Only way to turn this off is editing the source code.
-No front end access. Users can't make quizzes, or view other reports without having admin privleges.
-The only way to view old quizzes (user) is a very elementary module at extra cost that shows simply quiz name and total points (and not a percent or how many it was out of.

I like elearningforce and their developer seems like a nice guy. I don't like writing reviews that point out issues but feel I must given my latest experience which I hope they will remedy, especially since each copy I bought on faith cost $70. The basic function of the script worked but little else, such as the emailing to users which was completely blank and provided the wrong test results. Almost no effort was made to ensure that output looks reasonably presentable. The way it is coded makes the existing templates and styles worthless and just a file to dump the whole window of output. I have no idea what these other reviewers are talking about. There are two templates, not several - the very basic and one more which should give you an idea of the poor design. It's a very cheap, outdated rendition of a Windows 95 window, complete with minimize, maximize and close buttons - all of which are graphics and not meant to work. Watch your users click on these buttons in utter confusion. Since there are no real docs with this either, have fun poking around. You'll understand why there is no online demo of this version. If you must have a quiz, look at the flash version very carefully. You can create 5 types of quizzes (very nice) but the options you'd usually find in free php quizzes are very limited. Looking forward to improvements here.

Purchased, download,l,and installed - was up and running in minutes. Had some PHP settings problems (my fault/lack of knowledge), and had them solved quickly and effectively with the assistance of their support!

Would recommend this product to anyone! Well done!

I have used this component. I consider a good tool by teachers and students. Students can choose the questions through to panel.
It's easy to use. The product have several templates with CSS.
The User can to organize the quiz in categories.
Finally and the best, it's stable. I recomme it.

I have used both Online Flash Quiz and Joomla Quiz.

Joomla Quiz has several features that online flash does not, such as being able to stylize your questions with CSS.

The product is stable and also allows users to build their own template designs.

I would definately recommend it.

Tom
Knoxville, TN