Mst: Preorder + Back in stock

The Shopify App has received mostly positive reviews from users. Users appreciate the ease of use, helpful customer support, and the functionality of alerting customers when items are restocked. The app has been praised for its great support team that is quick to respond and assist with any issues. Users have mentioned using the app for years and being satisfied with its performance. However, there are some negative reviews mentioning issues with the app not working properly, lack of response from support, and occasional bugs after updates. Overall, the app seems to be well-liked for its functionality and customer service.