I work on Cadillacs every day. The CUE has been a nightmare from launch. I could make a whole days pay on an XTS with recalls alone. I dread when this launches now. I can only imagine the issues we will have to address. Someone mentioned the lag. It is still very laggy among the entire line. Not to mention some inputs get ignored completely. And to whomever it was, it's not just a little box under the dash. It's a system comprised of several modules including the interface device. They are all deeply integrated with each other. So you're not just replacing the "box" as you call it.