That might be true if you are infrequent Costco shopper.

Aside from changes in seasonal items the aisles don't change much if at all.  The only frustrating part is that some items aren't carried on a consistent basis for no apparent reason other than perhaps making room for new product or changes in room required for seasonal products.  

Not to mention that the pallet shelving format allows you to quickly look from the edge of aisle and give you a pretty good idea what type of products you are going to find.