I haven't had a lockup of any kind in Poser 5 for months now (even before SR4.1). Once I figured out how to tweak Firefly to optimal render settings for each particular scene, renders went much smoother with no problems other than it's still a little slow for me. If you're not familiar with procedural or node-based materials, you might be a little intimidated by the Material room, but once you catch on, it's really powerful and 10x better than the texturing meathod in P4. There can be no doubt about that. Be aware none of Daz's products fully support P5, but that's not to say they don't work well on it. They do, but sometimes require some tweaking to the materials. Cloth room is fantastic, and once you learn it, you'll love it. You might not want to cloth your figures any other way after that. All in all, I'm happy with it.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.