I tried it a few years ago, but I had a hard time getting into it. (Back then, ) its documentation failed past the obvious first examples, which meant that the authors basically assumed you already knew everything about how to write realtime 3d graphics on modern hardware and recent OpenGL versions.

I'd assume that if I already knew all of that, I would've probably made some own code for it before, so wouldn't need Cinder for anything. Compared to Processing, Cinder's entry-barrier is orders of magnitude higher.

Or maybe I'm just too stupid. :-)