All of these stores seem to charge a premium for products that you can get in a good grocery store or drug store or vitamin shop. The people here are very knowledgeable and there is a pretty decent selection for most of the items you might look for in a place like this. You just have to know that it is going to cost you 50% or more above what you could get the same product for if you search around. Probably the upgrade in service and knowledge is worth it.
Cons: Expensive, parking/traffic