So far so good
I've never used ZBrush before, but I have beavered away at learning LW v. 10 for quite a while. ZBrush is easier. It may or may not be as versatile, but what I need is a 3D sculpture tool, rather than high-end animation power. I managed to get the general idea the first time I opened the application. The interface is pretty clear and well-organized for a 3D package. It will take a while to get good at it, but I can do more already in Zbrush than I can in LW.