The roots get air-prunned(no swirl) from the airpots. Thats why i love going from them to bigger pots. Plus, while growing in the smart pots, they dry out a little quicker when they are younger, which is good to. Pro-mix benefits the most i would think, but i usually rock coco.
Just peel evenly down the smartpot, you'll get it down. Some people i know wash their smartpots for re-use. I don't. I keep them turned inside out, shake/bang the shit outta them, and they are ready for another round.
I hear you on the Cali power. They make shit loads of it from water around here, and you think we would get a better deal. Yeahrite!