That's not the question he asked. It took me about 10 minutes to learn the Unity keybinds, but a few days to reach my current level of productivity. For instance, I experimented with a few tiled arrangements of console, emacs windows & firefox. The best turned out to be different from before because of the ctrl-alt-numpad shortcuts. They sound like something a tiling manager would have -- Unity really gives me the feeling of stealing from the best.