Latest update is very stable, I haven't had any crash so far. The Poser import is still not 100% fixed if you use Poser7. I still use P6, and no problem with props, they load normally. I don't use the poser shader tree option, so it's working real good for me. Memory wise, Poser imports are still very heavy on resources, but disabling the background draw thread helps working normally on a scene. I had problems the other day bringing in a G2 figure with dynamic hair, had to work in wireframe to get some response from the interface. That said, the import with dyn hair was 1.2 million polys.
So it's not perfect, but it's the best update so far, and they fixed many bugs.
But if you're on mac, there is a serious slowdown when rendering. By serious I mean up to 4 times slower than previous built. Only on mac. PC is fine.