Discounts, BOGO & Gifts ‑ AIOD

We used this app primarily for tiered level discounts: ie buy 6 get 10%, buy 12 get 15%. Sometimes the discount applied at checkout..and sometimes it didnt, the developers although responsive upon first installation (this is second star or i would have given 1) they could not figure out why the discount would not go through on some orders. this app also means you cannot use shopify discounts on the store because there reasoning is that it conflicts with the app. this app did not work as intended and created a lot of angry customers that we had to manually refund on discounted items. more administrative work for the team on something that should be automatic