This plugin has become the absolute best feature of our site. We post a ton of fiction reviews and recommendations, but a massive tag cloud was our only way for readers to search/browse by theme, subject, length, etc -- and even then, they could only view one taxonomy at a time. This plugin instantly made our tags useful and added a whole new dimension to browsing our site. We use "WCK Custom Fields and Custom Post Types Creator" to create our sets of tags, and then we use Taxonomy Picker to create the ultimate advanced search widget. Our readers can now run a combined search for their faves, like a romance story that includes time-travel and is less than 100K words in length --- all thanks to this amazing plugin!