This is just a great place is you're a foodie, I guess. Incredible array of everything that's edible...meats, fish, nuts, bakery goods, cheeses...you name it and it's here. And if it's not here, you don't need it! Flowers, too.
I usually spend several hours here...just walking around looking and watching -- great people watching environment -- before I finally start shopping. Saturdays are very busy...either get there very early when the selection is the largest, or go late, when the prices tend to moderate a bit.
either way, go. You will enjoy the crowd and the atmosphere!