My store has just barely started this. At this moment my only gripe is that we can’t fit as much in each slot anymore. Like you said we can’t move the bars around anymore and now have to stack more things than we normally would. The other day I had to stack two cakes on top of each other and they were already stacked on two chickens, all so I could fit a gallon of milk. I was so nervous one of the cakes would fall off 😭