I own a bunch of the normal Xbox One controllers and haven't had any issues with them with the exception of wear and tear on the shoulders (too much Rocket League).

I got the Elite Series 2 and immediately noticed two defects out of the box (face buttons registering phantom presses or they simply don't register presses at all). Sent to Microsoft to be repaired, got it back and it seemed better but they somehow broke the tension lock on the right joystick, so I sent it in for repair again. Got it back and it seemed alright, but then noticed the original problems with the face buttons within about a day, while not to the same degree, still unreliable.

What the hell, third time's a charm, right? No dice. Got it back seemingly in the exact same condition. As far as I can tell, there's something seriously wrong with the Series 2. My friend has no such issues with his, but I read about similar horror stories of people experiencing the same problem I'm having. I just stopped sending the controller in for repair when it seemed like it was a pointless endeavor.