With respect to a 2014 Lasalle, the following problems range from perplexing to dangerous. With a mere 2000 miles on it, these problems came with the car.
The door chimes ring in a most irritating manner and for no reasonable reason. Can one de-activate some of these?
The radio "buttons" work via ones finger only sometimes!
Speed control can vary plus or minus 5 mph - or more!
Response time can be irritatingly *-l-o-w! Are you using a computer chip from two decades ago? What is up with this?
Now for the DANGEROUS aspect; when Dynamic Cruise Control is activated braking occurs during totally illogical times! Such as on a straight highway or not, when no vehicle is even in sight! Frustrating in the extreme and dangerous while on a congested freeway and the vehicle following you (often closely) do not anticipate such maneuvers
Sales personnel are helpless to explain the system and mechanics tell me "There is nothing wrong"!