I've been using this app for 1.5 years now and we use it for checking how our system works with Shopify and if we are inserting the products correctly or updating wrongly. In my opinion is very usefull.
Non existent customer service, have been messaging their live chat and also their contact form with not a single reply for weeks. I see no benefit or use for this app or developer
Thanks for sharing your review and feedback. We are extremely sorry that we missed your chat. We give high priority to our customer's experience. We will be sending an email shortly to help you with the issue you are having. ~Hari Das, Logify Support Team