Whole foods is my food security blanket.
When I don't care about price and I just want to eat to my hearts content food that seems fresh and relatively healthy, this is where I land.
You can get hot food or a salad at their salad bar and eat it in the front of the store at cute little booths. You *could* do your grocery shopping here too....but only if you are loaded with the dough or have a diet of canned peas only ($1.25 a can! damn!).
Anyway cleanliness and selection and good lighting are important components of the pittsburgh whole foods equation. Also the people that work there are usually in a good mood which is nice.