Ok, first, let me get one thing out of the way. The xbox 360 controller was probably one of the best, if not the best, gaming pads I have ever had the privilege to use. Even after all these years on market, it never gets old.
Now, the X1 controller is, without a doubt, a new standard in the xbox's line-up of controllers. I have bought this one from gamestop and it's in my home, ready to be played with the xbox one, so this review is a summary of using the controller from all of the events that I have attended (xbox one tours, microsoft store xbox one events, e3, gamescom, etc.) so I have had a fairly lengthy time using the controller. The ergonomics are simply brilliant as the controller fits snugly in your hand and it is a bit smaller and tighter so all the buttons are more easily reachable.
One of the best things about the new controller is the impulse triggers feature. Oh, man. These things are just great. They said that they integrated a whole bunch of tiny rumble parts so that when you shoot a weapon, drive a car, run in a game, etc.- whatever you do in a game will match the action to the rumble feedback for more realism. I tried this out with forza and man, this is a world of difference. This feature alone would warrant this controller 5 stars, but the improved grip on the thumbsticks, the more fluid trigger-to-button layout, and the removal of the battery pack bulge on the back add even more value to this controller.
Now, the last thing I have to mention. The D-pad has been finally fixed. It now rests in a depressed setting at the same location as the x360 controller, but now the D-pad is designed to work flawlessly with fighting games and other games that rely more on the D-pad. I tried this out with killer instinct at one of the events and it worked wonders. Huge, huge improvement over the xbox 360 D-pad (which was just awkward).
Overall, the Xbox One controller is brilliant, already piling more improvements and features on top of an already awesome xbox 360 controller. The improved D-pad, innovative impulse-triggers feedback mechanism, insanely comfortable grip and ergonomics, and other tiny little things make the Xbox One controller a great new addition to the Xbox family of controllers. Oh, and that sweet looking Xbox logo at the top looks slick as ever.
Hopefully, my impressions/review helped any of you guys and gals out. Peace and game on.