i also use zbrush but the learning curve on that thing is monsterious it's as bad a rhino, truespace is easy because you can do everything in one window and hardly have to switch views which is why i like it. but it is very limited if you want to create organic models like people or animals but it will just about anything else that does not have nurb like contours like car for instance not happening, it would be very tough to model in truespace unless you did it in sections and parts but it would be one hell of a pain, but houses, furniture,clothing props stuff like that even poser hair it's great for.