I think I'll go to heated grips some time in the future.
Interesting thing about that: My wife & I did an Iron-Butt Saddle-Sore (1000 mile ride in 24 hours) ride in the fall of '14. She had heated grips and I had heated gloves. You think that'd be a wash, right? Like, no difference, right?
There WAS difference: Her hands ached toward the end of it b/c she had to grip the heated grips harder to get heat out of them and they didn't add heat to the backs of her hands, where I was just fine even if I pulled my hand(s) off the grips.
Just wanted to add that tidbit.
I agree, the harness to power those things just sucks!