ok, I both LOVE and HATE ZBrush.. They are both strong words, but I can't think of anything else to explain it. after being used to the stability and precision of Maya, Zbrush feels kind of like an amature interface. Maybe im just spoiled, but for a program ....SO USEFULL.... I'd think it would have a better GUI.

All in all ZBrush is worth every penny at it's current price.

ps. the level of detail you can get to on ZBrush is incredible. Texturing and Displacement maps have never been better. just make sure to use Maya to set UV's if you intend on going back to maya.