Wo ho. That's fightin' talk.
In my experience, these commercial people are not complete idiots. They may take shortcuts, but they are calculated shortcuts.
I like the results of Anders' approach better, despite it being GUI-less, and so a PitA to use, even for someone like me, who remembers the DOS world.
The RawDigger approach may be better, but the documentation is quite limited (e.g., the how to on creating camera profiles starts somewhere in the middle and does not explain what sort of profiles you need to generate, for what purpose). In this case, what may be a technically superior solution to XRite's will remain an undiscovered country to those not prepared to do more than follow a simple recipe.