I posted this earlier when the team was testing 1.8.5 but I thought I would repost it here for others to see. While this was a slightly earlier version of PCC the results is what you get today.
Real simple, here is a shot of the Pelican. Only 43-60 second exposures with my modified Nex-5. Flow goes like this after pre-processing- ABE, PCC, ColorSaturation tool with a linear saturation, AutoSTF to HistogramTransformation and then ExponentialTransformation. No tricky color stuff, no masking of stars while applying tools. I think this is how color calibration should work IMHO.
Mike