Philip C.wrote a review of Shimano XTR SL-M9000 Trigger Shifters on May 8, 2016
Familiarity: I've put it through the wringer
First ride out, I crossed up the bars, and went endo. No big deal, but the "carbon" leaver is very fragile and snapped right off. Stuff is great, but nor very robust. I was very surprised. I have never had this happen with my SRAM or even less expensive LX/XT stuff, and yep I have eaten dirt a decent bit with them. I think the weight and etc are great with XTR, but I think their durability is highly questionable.