munro harrap: Camera colour is corrected already, and should be perfectly accurate.Each machine should replicate that calibration but some do not, just as some lenses are not sharp, or have centering defects etc. Just as they get replaced, so too should your camera when its colour is bad, simples.
Software calibration is what your camera should already have
Yes each camera is calibrated but most of us are not shooting JPEG. When you use raw its up for the software to bring it home for you. This is where x-rite really shines and profiles your raw software to pull the most out of your camera. In this case it works well with Lightroom. I have purchased one and it works great.
MPA1: Why would you want it, though?I tried both LR and Aperture and found the latter much more useful. Also, it's not free - you're paying for it in the camera price. I dislike the Adobe march to dominance and find it ethically questionable of Leica to do this.
Because that is your opinion. Not everyone shares it. Aperture for me is needlessly complex. Lightroom is intuitive, fast and serves as a perfect companion to Photoshop. No Aperture for me.