I love whole foods but we all know how it got it's nickname "whole paycheck". I am not vegan or organic but if organic is reasonably priced, of course that's going to be my choice. Mostly I shop at Whole Foods for items I can't find anywhere else. I eat mostly fish and in Summerlin (so far) they have the freshest fish and largest variety of not-previously-frozen fish. The selection is not huge but there are at least 3-4 fresh items each day.
The produce section is great. Some things are the same price as other grocery stores and other things are pretty outrageous... but where else can you find black garlic or fresh morel mushrooms? (At the time of this review I'm waiting for the morels to come in... so I can fight the same little French guy I wrestle every year to get a bunch before they sell out!)
Of course, the prepared food section is great. I like to cook so I don't buy that much but when I'm hungry now I'm OK with the sushi and a lot of things behind the glass. (Just got Quinoa cakes that were crazy good) Mostly, I LOVE the juice bar. I have a great juicer at home but have found that by the time I buy all the groceries to make my favorite juices... it's not that much cheaper. (and juicing is messy and I hate the clean-up)
Overall, it's hard to go wrong with whole foods if you are not on a budget.