The fact that people can now like and signup on my site through their Facebook accounts has been a big plus. I noticed about 15% signup rate just in the past week.
They have demo sites for both Joomla 1.5 & 1.7 and these are set-up nicely and give you full access to test. A few more video tutorials would have been nice but I can't complain much as the modules are pretty simple to use.
The price is the cheapest I found compared to other extensions I seen. They are providing plenty of modules and also gives access to all joomla 1.5, 1.6 & 1.7 extensions.
I would recommend this product and certainly the amazing support that I received so far.