Process and product
Process: First let me reassure anyone that is hesitant to buy through Novedge that it is a painless process and significantly cheaper than going directly to Pixologic for Zbrush.
Product: ZBrush is an amazing product, but it is not intuitive to learn or use. It is not impossible obviously, but it isn't intuitive, so plan on spending some time getting up to speed on it. Somewhere in the process I came across something that said you must realize that ZBrush is a special child and requires special effort and attention. Somehow that eased my frustration. I'm still learning it, but quickly gaining traction now. If you question whether or not it is worth the effort, just Google ZBrush sculptures and look at what is possible.