When Blue Bottle Coffee switches to Square there was a noticeable decline in the throughput at the cash register.  It just takes the retail employee longer to do anything on an iPad.  Pretty much everything can be done faster on a real cash register.  There have also been the requisite outages, of course.  Recently I was at Blue Bottle and the Square terminal wasn&#x27;t opening the cash drawer.  They were making change out of the tip jar :-&#x2F;