Ranked in these QuestionsQuestion Ranking
Pro Best for hi-poly modeling
Due to the nature of the program and how it uses high poly mesh sculpting it is best to consider this app when wanting high poly models, as that is what it aims to do best.
Pro Has low poly modelling tools with 4r7 version
Pro Powerful brush system allows for lots of creativity
ZBrush lets the user sculpt an object in fine detail with customizable 3D brushes.
Pro Can easily simplify mesh topology
Meshes sculpted with ZBrush can contain billions of polygons, but tools are provided to cleanly reduce the poly count.
Con Hi-poly only
A single-user license for ZBrush costs $795.
Con UI is far from user friendly
Con An odd perspective view
Does not lend itself to cinematic or artistic renderings due to a strange perspective system found nowhere else in 3D which warps according to the relationships between models and rendering viewpoint - there is no real 'camera'.
It is sufficient for rendering your work on a sculptural piece or industrial design, but KeyShot Pro or any other PBR rendering program that uses a camera are recommended for scene rendering, at least in 4R7.