Nice review Rick
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I have this set myself and I've used everthing except the Damp Earth and bag of plaster. The Kursk (Kurks!) Earth is great to add flowing grime around various details- if you work it just like AK's Streaking Grime product. The Wet Effects Fluid is not as 'gloopy' (very technical) as Mig Productions Wet Effects and it seems to flow better.
I agree with Rick about the single pigment (Dark Earth) though- its good quality but another pigment would make the package a lot better. I've used it dry and found it to be not that Dark. But it goes on well and with some other pigments to vary the color looks very good.
I look forward to trying out the full set to create effects like Ricks.