Smart Product Filter & Search

There are a lot of filter apps available, but this is the one you should use. They have the fastest, most comprehensive and helpful customer service and tech support I've ever seen for a 3rd party app - and the app itself is extremely robust. It is 100% worth the price, especially if you have a store with lots of products that need extremely specific, individually customized and unique filters.

If you're coming from a tag-based system, this will be a cakewalk for you. Also - don't neglect optimizing your search bar!!