I have the Razer Onza TE and from my experience (has since it launched) it is infinately better than the official controller and I have had zero issues. It feels nicer to hold. The triggers are incredible to use. The d-pad finally works they way MS never could get it to work. It lights up and the resistance switches on the analgue sticks really do make a difference to gaming. The two extra bumbers (programmable) are useful for games and honestly once you've used it and you pick up the official MS controller you'll go straight back to the Razer
People here complaining either have never used one and are referring you to one issue or have been unlucky with faults which Razer give a very generous warranty for and will replace with no quibble. MS will kick up a fuss and I have certainly heard of just as many complaints about faulty official controllers than other controllers so faults will always be present in hardware and peripherals when they are mass produced. If yours is get it replaced simple.
As for the wire its about 15ft long and braided. Doesnt get in the way and you can plug and play on the PC wiuth it too. Oh and the face buttons are switch meaning they have a longer life span and are also more responsive
It is a great controller and I wont go back now