It's nice to have your learning tools in one place, working methodically and delivered in a consistent manner and CG Cookie is pretty good as far as Blender tuts go.
Would I pay for it? . . .No!
Blender wiki, forums and a multitude of videos online, do the same job and costs me nothing!
OK, sometimes you do have to spend a fair bit of time sifting through the rubbish to find the thing that you are looking for but that's my choice!