An anonymous reader writes: I do not recall anyone ever complaining about the iOS interface and there have been plenty of attempts to replicate the experience and its flow of control. When we first saw the iOS interface on the iPhone, the interface felt natural and just right, effortlessly. iOS has worked flawlessly for the iPad as well: An extremely easy to use and intuitive user interface for occasionally highly complex tasks. As simple as iOS may appear on the surface, it is incredibly well-executed balance that matches the requirements of a touch interface for phones, tablets and other horizontal screen devices. Changing the user scenario, hardware, or software will alter the requirements for the desired user experience as well. Cadillac’s CUE in-car entertainment system is the best effort to translate “touch” in cars yet, but it’s not perfect yet. Here are our initial impressions after a week with the Cadillac XTS.