Thanks for your positive review. Regaring your comparison with Joomla built in SEF, I have already answered that in details in a previous review response, so I don't think moderators would like me to put that same response again.
However, the short version is:
- SEF urls are only a small part of sh404SEF, think Analytics, shurls, security
- there has been no major improvement in Joomle on SEO since 1.0, aside from switching to table less output as standard output. Duplicate content is still the same, and URL length has increased, not decreased.
Though the native system is perfect, fast and efficient, if you want to go further in the competition for traffic, you have options to improve things, and sh404SEF is one of them.
What I found expecially to notice, is the great support provided by the OrdaSoft Team, also for the non commercial version. Thank you.