Considering how practical and useful heated grips are I'm surprised most bikes simply don't come with them as standard as they are relatively cheap although I see most higher end bikes are providing them as standard equipment now. For the majority of people I think heated grips will be a slightly more viable choice than heated gloves given their price and convenience advantages, although each has distinctive advantages in different situations. I've had both.
- warmer and more comfortable when it's cold, more even heat, heat backs of hands and fingers, waterproof and insulated
- can be used on multiple bikes simply by wiring connector plug to battery
- use less power than heated grips, more energy efficient
- works best when used in conjunction with heated jacket liner so they can plug into cuffs. Without heated jacket liner you need to install wires under your jacket every time you put it on.
- requires additional purchase of tempature controller, two channel if you also have a heated liner
- relatively cheap to purchase compared to cost of heated gloves and required temp controller (~ <$120)
- more convenient, always on bike ready to use, nothing to plug in or unplug when getting dressed or getting on or off bike, can be easily used with or without heated jacket liner
- can extend usefulness of summer gloves into cooler temps
- cannot be removed from bike if you decide to sell it at a later date or used on multiple bikes
- you still require insulated gloves when it's cold
Oxford heated grips work well and are the default choice for aftermarket heated grips, they are cheap and perform well but have an ugly temp controller on the handle bars. Kawasaki OEM brand heated grips seem to have quality issues according to magazine reviews and are over priced. These seem to offer the best of both worlds...............
Koso Apollo Heated Grips Review - webBikeWorld