WooCommerce Product Sort and Display FREE version is fully featured if all you want to do is sort the display of products on your site’s shop page. It has many features, and rather than fill this page with them you can read about those and download the FREE version plugin here on the wordpress.org listing page.
We suggest that if you are not already using the FREE version you should do so — if you just want sort and display for your shop page then you do not need this Premium Version.
WooCommerce Product Sort and Display has ALL of the features of the Free version plus these advanced features:
The WooCommerce Product Sort and Display Premium version is for WooCommerce store owners who want to take control of product placement on the product categories and sub categories sections of their store. The Premium version’s shopkeeper super powers give you the same ability that a bricks and mortar retailer has in deciding which products or group of products a customer sees first when they enter their store and browse their offering.
Our plugin totally revolutionizes the way product categories are displayed — especially Parent / Child categories. Features:
Parent and child category display works best when the rest of your category navigation keeps up with it. If shoppers reach these pages from a sidebar category tree, WooCommerce Categories Ultra Widget mirrors the same parent/child structure with AJAX expand and product counts, and WooCommerce Feature Category Widget promotes your key categories with images before shoppers ever start browsing.
The WooCommerce Product Sort and Display Premium plugin adds the 2 new sort functions that are applied to the shop page in the FREE version to the entire store. Those 2 new custom features are:
Features:

Enhance your users’ interface with your WooCommerce store by activating the built-in Endless Scroll feature if your theme does not already provide it. Choice of Auto Endless Scroll or Scroll on click.

WooCommerce Product Sort and Display Premium can apply its magic on the Default WordPress Twenty Ten and Twenty Eleven themes — all WooThemes and any theme that is created following the WordPress and WooCommerce theme developers Codex.
If a Bespoke theme does not follow the WooCommerce Theme Developer Codex (which they should have if they are claiming their theme is WooCommerce ready) then you may have problems as the plugins functions rely on the functions set out in the Codex being present in the theme. if they are not then the plugin cannot work correctly – if at all.