I have tried the Co-Polymer and I like it as well. I have have also tried the Flourocarbon and have mixed thoughts about it. First off it does not cast real well but that has been the nature of flourocarbon for me. Next, if you don't place close attention to the line and you have a kink in the line, it will break. On the good side though, I have noticed increased strikes with this line. I tested it against some p-line floroclear, Yo-Zuri Hybrid and Gamma's Copolymer using the same bait. The fish, flat out, can't see this stuff. Also, the knot strength is excellent and the line is almost impossible to break.
Is the Gamma flourocarbon worth the money?
Not really, but it is the best flourocarbon I have tried yet. I will be testing out Berkley's new Flourocarbon line tomorrow. At first glance, it seems be less stiff and less brittle. Also, it seems to have less memory but more stretch than Gamma.