Heated grips, gloves, and hand guards
Have heated grips, BMW winter gloves, and hand guards on my GS ADV. In Denver I've gone down to 25 degrees and my hands were warm but the tips of my thumbs were way cold. My guess is that the wind is rolling underneath the guards and chilling the thumb tips, which tend to stick out and down. Still looking for that perfect pair of winter gloves that keep the thumb tips warm. Anyway, like others have said, grips are great because you can turn them on and off with ease. I've never used heated gloves.
2007 F650GS (sold) 2009 R1200 GS Adv (almost owned)
"Collective fear stimulates herd instinct and tends to produce ferocity toward those who are not regarded as members of the herd." -Bertrand Russell