Definitely download the 10.5 trial - here, do what I did:
Go into C4D's browser, in the MOCCA folder, locate the "Flabio" character - dblclick it to load the project.
Open the
Visual Selector for the character (say "Ohhh, Ahhh..." etc...)
Now, select the different controllers and move around the character and play with the rig - I was sold at that point ;-)
Also in the same folder, open the Pandora (female) character - the rigg setup for her is just awesome!
I had never cared about C4D/BodyPaint before I started using MOI.
I downloaded the demo and saw that all my MOI objects looked
exactly the same way in C4D so I was pretty much sold - playing around with those character riggs did it for me!
It was almost like when I downloaded the trial of Particle Illusion a coupla years ago - after about 2-mins of dragging around the different particle effects - I went back to the site and spent my monae! It was that good!
-Will