VERY knowledgeable staff, EXCELLENT service, Competitive pricing. I was searching high and low for he right stuff to help strengthen my immune system. I saw GNC first and they knew exactly what they were talking about. So I sat and thought about it and decided to look at nutrishop and vitaminshoppe. The staff in both places could not determine vitamin A from vitamin D. So I went back to GNC and decided to get the 30 day vitapack, and the jar of protein powder. Before I became a member I would have paid 200 for both but I saved 100 just by signing up for their membership. Since I am going into the air force and am preparing for basic training, GNC is a great place to start.