My first experience with HUD was in my Corvette and once you experience this outstanding safety/information feature it is difficult imagining driving without it (mind you, it did not stop me from catching a 79 in a 65 speeding ticket the sixth day it was out of the dealership. Six years of speeding in my C6 and not even a parking offense. Go figure).
GM is the world leader in the development of auto HUD technology and "we ain't seen nothing yet" - their next generation of HUD safety/information/navigation will be simply amazing. In the meantime we have the LaCrosse and it's getting the essential data up on the windshield in-your-face is second to none in the market.
Even with perfection there is always room for improvement and the over the hood visibility in the Lacrosse is more than challenging, even for tall people like me. A version of the "ultrasonic rear parking assist" planted in the front would be much appreciated. Perhaps it is on Buick's' to-do list for their 2012 model.
Bottom line - the CXS is a great all around four door driving machine providing everything you would want at a great price.