The plugin has very high flexibility and for now it is the most comprehensive solution for making content is searchable by meta fields AND taxonomies among wordpress plugins on codecanyon and wordpress.org!
Demo http://codecanyon.net/item/wordpress-meta-data-taxonomies-filter/7002700
Downloadhttps://www.filecad.com/mx2A/WordPress-Meta-Data-&-Taxonomies-Filter-v2.2.6.rar