I had the same idea as Eugene Huliakevich about two days ago, which was to model a keyboard. Took me two days as well, and I did it on my own (following Nikita's advice) before starting the next surface modeling course. This was modeled in Plasticity, textured and rendered in Blender. I know if I had tried to quad-model this in Blender I would have bogged down, but it was pretty easy in Plasticity, thanks in no small part to what I have learned from Nikita - thanks Nikita!