There are a lot of factors that go into whether or not Chris Christensen brushes are worth it for you. It depends on things like how often you brush your dog, what kind of coat your dog has, and how much you're willing to spend.
Generally speaking, Chris Christensen brushes are high quality and will last a long time. They're also great for dogs with thicker coats, as they can help to reduce shedding. If you brush your dog regularly and have the budget for it, then a Chris Christensen brush is probably worth the investment.