WOOF has a lot of in-built extensions like: search STATISTIC, show attributes as Colors, show attributes as Images, Meta Filter, Search by Text, Search by SKU, Taxonomy Range-slider, Hierarchy drop-down, show attributes as Labels, On sales checkbox, In stock checkbox, create search SEO links.
Perhaps you are a WordPress+PHP developer looking for even further flexibility? You can take advantage of the WOOF extension API to create something unusual for your project or a customer one. Using WOOF extension API and default extensions as an examples you can create proffecionally any extension for the search form and even custom woo-products loop template for your own purposes. Maximum flexibility! Not just for developers, this advanced plugin will allow every user a much greater level of flexibility than your stockstandard display WooCommerce store – best way to extend the functionality.