Cal Audio CL-10 and Theta GenVa - - - TLC?

Looking for opinions as to level of improvement that could be expected by adding a Theta TLC to the above system. I know it is an inexpensive tweak, but do not want to end up with an extra piece of equipment and coax cables if the addition will not make a noticable difference. I have talked with a few people, and get answers ranging from "dramatic" to "maybe slight" improvement. Would appreciate input.

Thanks,