It appears to easily display add-ons for a particular product. The problem is the visual formatting was way off from what would work with our product line we deleted it immediately to avoid confusing customers. If you had one or two options for your products it may work fine, but our product line has dozens of options, which pushed the product description down so far users wouldn't be able to find the actual product.
Sorry to hear that. Seems like you need a more customized solution, which is also possible to do:
- Custom styles: https://support.upsellproductaddons.com/custom-styles
- Custom templates: https://support.upsellproductaddons.com/custom-templates
Or just email us and we will try to help.