i've been riding with one this year unless i can get a really good parking spot. i dont like carrying stuff in my pockets so i use my backpack for water, cell phone, little bit of food, safety meeting materials, screwdriver. im sure i look like a gaper but it beats heading back to the lodge or the car all the time
This. If I'm up there with family and friends I typically keep it for water/layers/wallet/whatever, and don't wear one otherwise. Also, why would it mess up your balance? If that were true no one would every go into the back country. Sure there is some adjustment with a heavy pack on when you're carrying a probe/shovel/layers/whatever, but even that's not a huge deal and no one is just bumming around the resort with that kind to gear in tow.
Frankly, I don't get why people who wear them just tootling around stir up such a big fashion debate.