I am using the full version a couple of months now and i must say that although there are a number of functionality improvements that could be added to this extension, it WORKS GREAT, it WORKS AS ADVERTISED and the SUPPORT IS AMONG THE BEST I HAD SO FAR, and I've been around since mambo...
The developers will answer your questions and even adapt code if needed. Great stuff so far.
I RECOMMEND this extension for those that need the "multi-categorisation of articles" or simply article tagging.
Thank you for your recommendation and great review! Happy Tagging!