I am now almost halfway through the BCS course. It is completely different from the WLS. It is an excellent course and gives a lot of background as well as practical information. The WLS gave me some good information but it was not something that was very foreign to me. The BCS is all about behavior, and while weight loss is the most common reason why people come to us, this material will apply to just any are in your life that would improve through behavior modification.
I like it a lot and wholeheartedly recommend it.