Canadian DIY Supply Inc. review for ADU: Automatic Discounts

This app worked great for us for about a year. Then, suddenly in January, we had complaints about customers not being able to get through checkout without it timing out. If they had a lot of line items in their cart, it seemed like the app could not update the automatic discount code properly with so many line items. As a result of this, we lost thousands and thousands of dollars. The app developers kept shifting blame to Shopify. Once we deleted the app, we no longer had complaints or issues. It seems that the issue was a combination of something that changed on the Shopify platform, PLUS this automatic discount app that could no longer adjust the discounted pricing at checkout when there were a lot of line items in the cart (typically 50+ line items). I tried reinstalling the app this week, and two days in we started receiving the exact same complaints again. Checkout was timing out for customers so they could not place their orders. We have immediately disabled and deleted this app, and will no longer be using it again. Frustrated that the app developers did not have communication with us, and never truly followed up on the issue.