Wow, just realized this addon doesn't yet have any reviews (partly my own fault!), which is crazy, because it's so excellent at what it does. No need for me to specify it all, since it's all there in the description, but suffice to say it takes the XF base tag experience to the next level, making tags much more useful in general. I've been using this addon for a couple years now and have had zero problems with it - it just works.