John B.wrote a review of SRAM GX Eagle 12-Speed Grip Shifter on December 20, 2017
Familiarity: I've used it several times
Great shifter for the money. With the 12 speed grip shifter you can dump or grab lots of gears with a twist of the wrist, without loosening a death grip on the bars or giving your thumb a work-out. If you've never tried on, this is a very affordable and excellent experiment.