I was saving money using them until today! My InstaCart subtotal was only $69 and change, and even after a replacement was made, it should have remained the same or less. My delivery guy provided the paper receipt, which showed a $66.97 subtotal. But InstaCart proceeded to charge me $75.47 subtotal. So after fees, I paid $95 instead of $86-$87. Their customer service is terrible on top of it, and there's ALWAYS excuses as to why their coupons don't work! I'm going back to Walmart grocery pickup!