App is ok but glitchy. Many times I've gotten an order carted, to get a message that says "invalid product code." I've also had trouble on several occasions, editing/deleting/adding items from the cart. In the cart, the numbers of items I'm ordering just begins changing, on it's own. Sometimes I resort to paying in cash and scanning the receipt barcode to the app, but that also almost never works for me. Manually entering the receipt number works most times. I've deleted app/reinstalled 4xs.