Currently have the .68 and .84 GC, as well as the .70 Mamba (Ti handle). The GCs are much more efficient razors, and almost as smooth at the Mamba. I have to say they are easier to get a great shave with than the Mamba, but I'm still learning that razor. Those 3, my Progress, and my 6C are not on the get rid of list. Actually those 5 razors basically killed my RAD.