I should preface by saying that I do not own a pair of these shades but I have bought them (special occasions) for my husband- it's his favorite. Since we were nearly done with Christmas shopping, we were able to get a little something for ourselves (an early Christmas gift).
The shades on sale- the prices are pretty good considering how expensive these shades are- (some are final sale- which you cannot return) are in locked tall glass cases (you will need assistance) located on the right side, near the walls filled with clothing (women's clothing- on the left side is men's BTW). The cash registers are at the very back- two cash registers. The soft lens case (doubles as lens cleaner) is also included with your purchase of shades BTW. If the shades are scratched, the cashier will replace the scratched ones with new ones- nice.
The setup is fine but when there are lots of people, it can get crowded (it's popular). The aisles are pretty narrow since the middle row is primarily more racks and tables of clothing- lots of clothing, really, since the first thing I think of when I see the brand, is the shades. There is a small section of shades on the left side- my husband only went to this section a few times, mostly goes to the sale cases.
Go for the sales on the shades.