I love Essence of Life. It is not only relatively inexpensive compared to other health food stores, it is also filled with endless product selections.
If you are seeking organic groceries, Essence of Life is the place to be. It tends to be busier around 5:00 PM during weekdays. You have have say "excuse me" politely repeatedly as you maneuver your way through the narrow isles. Regardless, it's almost 10-30% cheaper than health food stores in other neighborhoods.
I would recommend checking Tutti Frutti down the street or Sugar & Spice first for supplements. They tend to be slightly cheaper than its counterpart. If the product is not available at either stores, purchase it from Essence of Life!