The SRAM 1x11 system is outstanding. I love the simplicity of only shifting the rear derailleur along with reduced weight and accuracy. The X01 shifter works flawlessly and is highly recommended to complete your 1x11 group.
When you're punching through gears on a technical climb (or a hair-raising descent), the last thing you want is your shifter quitting halfway through, and the X1 Trigger shifter is damn good at the job. Whether you're thumbing through 3 gears or taking it nice and gently through each one, I have yet to jam this baby up or miss shift... And not for lack of trying.
Quality machining has created a shifter body and levers that all but ignore ground smashes, and proper timing has built a house that simply won't be compromised. Simply put? Buy this shifter. You'll be happy.