Why do I want brushless?

[RobWoodall]

I have a brushless setup on the Easy Star, and brushed on the Super Cub. I had brushed on the Slow Stick, until my lack of skill destroyed the first motor, and I replaced it with a brushless setup.

I notice that whenever anyone posts something about a plane with a brushed motor, someone (usually several people) always posts "you can easily upgrade that to brushless."

My question is "What's the advantages of brushless, beyond more power?" I mean, if modeling fighter jets and stunt planes, if would be an obvious choice, but why for park flyers? No one is doing 3-D acrobatics with a HZ Super Cub (I hope, anyway) and it seems that few people are racing Slow Sticks. In addition to their greater power, are they more efficient, providing better battery life? Do they last longer?

I'm very much a newbie, so don't feel like you're talking down to me, and don't assume that I understand the basics, as I probably don't. Just give me your thoughts on why brushless is better.