I've been using AOI as a fantastic addon to Poser for a year now.  I can create objects in AOI, export as OBJ, then import into Poser. Adjust the textures, add bones, etc. in Poser and save as props or figures.  It's great for easily making detail objects or simple figures for your scenes or animations. And, it's free!

I've been using the animation feature, and it is actually very powerful. You can actually animate individual vertices, edges and faces, etc. as well as bones and joints.  This gives you a lot more control that I wish Poser had.

AOI has a very powerful procedural texture AND material capability.  great for making fire, fur, and much more.

For me, AOI is the object modeling tool, Poser forgot to include...