I jumped from Poser 3 to Poser 5. It's good, and the service releases have made a huge difference, but there's so much that's still badly done. The user can't easily configure the interface to get a pleasant, clear, combination of colours. Unless you can hack xml files, you're stuck with drab, low-contrast, shit-brown. The manual is badly written and poorly indexed, and the "help" brings up a .pdf of the manual. The changing of textures, colours, and other details in the Material Room can still need a rander before it can be seen. The ordinary, generally-used, elements of the Windows UI are frequently ignored, and it's not always clear which of the many windows within Poser is waiting to accept a command.