Yes. One great 2d/3d feature among many is the image plane. Often I'll do a hand sketch, quite rough, and use MOI to trace it, after a quick snapshot with my digital camera. MOI image plane is wonderfully easy to align, adjust transparency and order - and then when your finished, easy to get rid off.
I don't have to manage multiple layers, file locking, etc.

After comes the effortless curve manipulation and hq anti-aliasing of lines....