I've had 2x on a Trek mountain bike and didn't really like it. I found that the gap between the lower and upper chainring was prime for chain drops or skipping. I ended up just keeping it in my preferred chainring for the trail i was on and just adjusted the rear gears up/down. It seems like whether its 1x, 2x, or even 3x they all have their pros and cons and their isn't one that is the clear winner in all categories.