I'll be the counterpoint and say that I do like P5, there are so many things to recommend it. so if you are starting from scratch and your computer is fairly new,(built in the last year or so) with plenty of memory, (min 512mb) all the new features are a definate + the material room and the new library system alone are worth the upgrade, and the firefly renderer blows the old renderer away and if you want to use it like p4 you can as it has both renderers. if you want to use poser for posing and rendering in another program the easy answer used to be P4 with or without propack, but now thats even becoming a grey area, as plugins for p5 are beginning to show up as well as a recent announcememt that Vue D'Esprit. is coming out with a free upgrade that will allow direct import from P5. sure p5 is still not without its bugs but P4 has its fair share as well, its just been around longer so the work arounds have been in place longer.