Well, you have to get your experience somewhere. If I had a workmate or acquaintance who could impart upon this knowledge upon me, I'd certainly take him up on it. However, with a niche product such as CCT, it's difficult to get into a situation like that.
If you get the right instructor from Global Knowledge, I believe that this class would be worth the time. I was fortunate and had a knowledgeable instructor who knew the material. However, if you get into a class let by an instructor that simply reads from the course material, it would probably not be such a wise expenditure.