The problem with GEM razors is the blades. They are no where near as sharp as a good DE blade or any Artist Club style blade. That's a fact almost everyone agrees with.
Well, I'm not sure I agree. The GEM PTFE shaves me better than any DE blade has. Whether thats down to sharpness or thickness, rigidity of the blade, I'm not sure but they shave me smoother and closer.
If I move from GEM style razors, which I am contemplating, it will be to the AC format just so I can try those blades but I'm completely happy with GEM razors and the GEM PTFE blade.