It works decently and is simple to setup. But if you have time-specific product 'drops', it tends to throttle and leave users unable to check out. It works fine if you don't need to deal with heavy traffic in bursts.

This app worked the one time we used it...then today it crashed and broke our cart (confirmed by Shopify Support). When I try to open the app in Shopify admin, I get a 502 error. Needless to say, we are cancelling and uninstalling this app.