Groff's has been here for a long, long time. I remember them from when I was little! True pioneers in the health-food industry, back when the health-food stores were a somewhat unusual phenomenon.
I can often find things there that I can't find in other stores, and they're very knowledgeable and helpful. They have excellent research books and a large cabinet of herbal teas. Definitely a pleasant shopping environment, and a good place to spend some time.