If you see this Slice app being used by your restaurant, be forewarned! The app is always glitching, you choose a coupon and it vanishes when you see the checkout total! We have had to call them to complain, and they say “oh just call us if any problems, and we can apply the coupon”!! How about a better idea and FIX your dam app! This has been an issue now FOUR times in a row, where we had to call the restaurant to order and use the coupon! We told them to find another app for their customers asap. Customer service seems low IQ, they do not comprehend the problem, and act like we can simply call them every time we use their app to credit coupons offered! NO WAY!