New Forgeworld weathering pigments

Wow, these look great. I wonder how they stack up against MIG pigments out there. From the mini how-to on the forge world site these look pretty sweet. A little expensive, but neat. Also cool to see that they are using the old school citadel paint pots... I still have a couple of those around from 1st edition 40k days. They have actually kept the paint from drying for almost 20 years. Not like the screw top paints that GW used to make.