Globo Product Options, Variant

The breadth of these product variations is vast and SO useful. I have some products that I need customers to agree terms to, or have a lot of customizations I need to capture, and this app does it all! Plus, their customer service is top notch. I recently upgraded to Shopify 2.0 Themes which broke the app, but customer service and devs were on it once I asked for help and fixed it within 24 hours for me!