Dutchies review for PreOrder Now Backorder WOD

Would not recommend this app, I installed it and opened my pre-orders, but so many things went wrong and it has cost me a lot of money. Automatic shopify discounts cannot be used when people place a pre-order via this app. Our customer support had to manual pay back all customers that didn't recieve their automatic discount (and my abandoned chart rate went skyhigh because people didn't buy because they didn't recieve their automatic discount) The app has to load in order to show the 'pre-order' button at a product. So first it shows the normal 'buy now' button, and when the page is completly loaded, it changes to a 'pre-order' button. So when people click fast, they can still order an item that is not available. And the notify-me option doesn't work at all, with the result that I have a list of customers that want to buy my product, but you can not export and I can only one-by-one copy then, search the product ID in Shopify and send a manual email. All together this app has cost me a lot of money and loss of income and I would definitly not recommend anyone to use it.