I spend a good chunk of my day in Excel and some might consider me a power user. He's pretty decent, and I picked up a couple tips from him (using a graphical line object instead of messing with cell borders for something you might need to move frequently for example).

There is definitely something mesmerizing though about watching someone conjure complex data onto a screen seemingly by magic and a few key strokes though. Although really it is just memorizing a ton of hot keys and a bunch of buried menu shortcuts.