Love my heated shield. I ride with my glasses since I can't handle contacts. Since I got my shield 3 years ago, I was able to remove the breathshield from the helmet (I have a modular) AND wear my glasses. It is an awesome set up. Very comfortable, I don't have any nasty breath deflector booger buildup, and my glasses nor the shield ever fog or freeze up.
Go for it, getting used to the dangling cord is no big deal. BUT, it would be nice for someone to figure out how to make one with a re-charchable battery in the shield.
Hey, now there is an idea..............