I have both and have used both extensively. (UV Mapper Pro and Ultimate Unwrap 3d) UV mapper pro is better for basic stuff...its stretching and unwrapping of edges is great and so on...also if you are working from Poser you dont have to re scale the tiny Poser size model.(all other apps use a much larger scale...so Ultimate requires this...re scaling is no problem though, and you need to do this to see the model in realtime 3d in the window) However overall Ultimate unwrap 3d is much much more powerful......you can subdivide any part of the model with out destroying the UVs (very usefull), you can pan the cAMERA around the 3d model in real time and point it at vertices and UV map them in real time in 2d (AWESOME FEATURE) also you can grab a line of vertices and straighten them vertically or horizontally in one stroke (doing this on UV mapper Pro is a PAIN!!! and slow as hell!! I would get both...they dont do the same job, rather they do different areas in a way. So to sum up...for basic Poser work...UV MAPPER PRO For just about everything else ULTIMATE UNWRAP To be honest Ultimate Unwrap is like a version 3 of UV Mapper pro...its way ahead. Cheers Harvey Mann