Commerce Bundles, while very powerful, isn’t exactly the most user-friendly from a UI standpoint. However, it is very customizable and there are a few things we can do really easily to improve the overall experience:

Using a View for the Bundle Item Autocomplete

Out of the box, Commerce Bundle’s Bundle Item Autocomplete looks solely at the title. This doesn’t scale really well if you give all of your products in a set (e.g. S-XXL shirts) the same name, which is pretty common. So instead, we can modify the widget to use a custom view to load and search for autocomplete suggestions. To enable: