The app is way too expensive. Also, it's not clear how partial refunds work within the app and how all the additional kind of receipts mentioned in the app description can be printed and configured. On top of that, the lack of an automatic way to print receipts after a sale is a dealbreaker because it's way too slow having to wait for the app link to appear at the very bottom of the POS order page.
We thank you for trying our app and for your review, we remain available for every detail of how the app works. On the subject of slowness, unfortunately, the button is shown by Shopify Pos and we have no control over this.