meh. x9 twisties on my geared hardtail. no problems. been riding with gripshift for about 8 years now......
i don't mis-shift. they don't shift when i'm climbing or descending. and i ride some ugly stuff, up and down, even some lifted DH days.
maybe all you folks whining about them messing up just need to learn to ride a bit better, or setup your bar/control space a bit better...........
caveat: if you have the long grip length grip shift of a few years ago, yeah, those suck. that's why that particular version is no longer made.........just a thought for ya.
gripshifter for my rear, and an old suntour thumbshifter running my front chainrings. loooooove that combo!