Shopify Marketplace Connect

The app can get extremely frustrating due to constraints when linking the Shopify catalog with existing listings on Ebay/Amazon. It leaves too much room for error, and the process to correct it is so complicated.

This app isn't very user-friendly. The instructions are incomplete.

The support is really hit or miss. Sometimes it's great, and sometimes it's downright infuriating and the person either doesn't understand the problem or is just trying to close the case without actually listening.