Poser - 7.0.1.109

Version 7 is definitely a step up for Poser.

I had issues with the stability up through version 6 on fairly high-end PowerPC hardware, in the past. It would crash while executing fairly simple tasks. I'm currently working on an Intel C2D, and it's running without a hiccup. I'm not sure if that makes a difference, or even if it should, considering, if software is released for a platform, it really ought to perform as reliably on that platform as it does on the others for which it is released. I can't really judge how the current version performs on PPC architecture, though maybe I'll fire up my PPC tower and find out.

While I do wish they'd overhaul the camera view controls (which are anything but intuitive and really need a redesign), there have been some decent tweaks made to the rest of the interface. Things feel a little less clumsy.

Along with the camera views, the editing tools along the top are my primary interface options. It would be nice if these stood out more, if the icons were a tad more representative in some cases of the intended use, and if, maybe, these were even something different completely from the web 2.0-style buttons they now seem to mimic.
Come to think of it, representation is the same issue with the camera views- the hands and arms really don't represent the tools well, though the trackball comes close. An odd comparison though it may be, the trackball might be a bit better if it were something akin to the gradient angle control in Freehand, or something which moves like a desktop USB trackball, and is a simple color sphere with a focal dot which moves with the camera angle. come to think of it, something similar could replace at least three of the current camera view tools. It would seem much more straight-forward (just because we're working with the human figure doesn't mean we have to have tools modeled after human parts, especially if it only serves to obfuscate their purpose).
And then there are the weird, plain white dots for scale, focal length, and roll (a shame, considering how well the tools themselves work).

Why there is such a striking disparateness between certain portions of the interface and others is bewildering. I sometimes think it was designed by several different UI designers, each with his or her own agenda.

The only tool which makes direct sense is the light controls tool: primary light source, core shadow, reflected light, each which are manipulated around a globe for direction, amount, and angle -simple enough and quite well done.

The saving grace to all of this is that there is text annotation for each tool as you hover over, and it's large, crisp easily read text which happens immediately and in the same spot just over the icons. (as compared to other software which uses tiny little popups).

Also worthy of positive note are the tabs at the top and the folding library, which snaps into existence with a click and is gone just as easily, allowing Poser to include as many features as it does and still keep them well organized and from becoming as intrusive as so many features could be when they're all accessible at the same time.

I can't comment on any animation features Poser may have, as I use it primarily as a tool for figure modeling for illustration and the like, which it works quite well for.
And, I think, I've written enough for now ;o)