GBS Trend review for LitCommerce eBay Etsy Amazon +

The app doesn't work properly. They are telling me that i am having trouble because i don't have GTIN Exemption on Amazon although i have and i am able to sync my product via another app. The worst thing is the customer service! Although they seem online, it takes ages to get a reply and unfortunately the customer service representatives are unexperienced. I don't recommend this app at all.