Here's a great discussion regarding EPGY & ALEKS:
http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/62015/1.html

I started out looking for help in choosing between ALEKS & EPGY and the conversation really took off in a few different directions.

Overall, I'm satisfied with the switch to EPGY, as it has proven to be much more demanding... but I really, really, REALLY wish EPGY & ALEKS could join forces.

I'm going to look at Thinkwell over spring break because the sample lectures were excellent -- I just need to see how the rest of the program works.

And... when our son is ready, Art of Problem Solving (AoPS) will be another consideration:
http://www.artofproblemsolving.com

Being offended is a natural consequence of leaving the house. - Fran Lebowitz