I generally prefer Shimano and push-pull shifting, over Sram and push-push shifting, but my current bike came with the GX Eagle 1x12 and I like it. It took me a month to get it fine tuned to shift smoothly, but since it has worked very well, much better than I expected. I clean and lube regularly and I am a slow intermediate rider, so I am not very hard on drive trains and cannot really discuss how it would hold up under abuse of a fast rider. But so far I've got about 600 miles on it and it is still going strong. The one thing is seems to do is skip shifts, or phantom shift, if there is even the smallest amount of debris in the cassette. If I pick up some Spanish moss or any vines I have to stop. My other bike is Shimano 9 speed and it seems like it will shift through a stick, not sure if that is the difference between Shimano and Sram, or the difference of more gears being more sensitive? Never rode a bike with a Shimano 11 speed. I have demo'd a bunch of bikes and never noticed the sensitivity on either Sram 11 speeds or Shimano 10 speeds, but in just a short ride it might not be something that would get noticed..