I am building a website, that is using this plugin.
I have custom post type for products, and two custom taxonomies for categories and styles.
The custom theme uses featured thumbnails for the main image to display for each product, and the parent category archive pages fetch the last featured thumbnail, so this is a great plugin for over-riding this default and to set a better thumbnail for a group of products.
I have a weird issue where some of the assigned thumbnails are fine and some category ID key's are one or two higher in value, breaking the functionality
If that doesn't make sense then I can try clarify it more.
We're days away from launching the site and the client is very finicky.