Zbrush is easy to use once you get stuck in (easy as in, it's intuitive to use and it's really up to your artistic abilities) - I wrote a tutorial when I had a Demo of Zbrush 2 - (I didn't go into a large amount of detail, at the time I had a low spec computer that couldn't go into the fine details) It's a absolute beginner to first textured model tutorial. At the time I was just learning myself, but I thought I'd document what I had done with more depth.
However the host I uploaded it to is gone, but I should still have the .pdf somewhere (I'll have a look later)
Excellent model Neo! I'm still yet to purchase Zbrush myself...maybe in a couple of months.
"Experience never provides its judgments with true or strict universality; but only (through induction) with assumed and comparative universality." - Immanuel Kant