Car will not respond for at least 2 seconds during a slow, rolling stop, when trying to accelerate again. unable to perform evasive manuever, if needed, secondary to the delay to accelerator input. harsh 2-1 downshifts also at slow speeds and can even feel as though you were struck from behind. highway driving is excellent; city driving challenging with the transmission. the driver has to learn how to drive this vehicle. find it very unusual after owning 5 other cadillacs and never had this problem. i bought this car as a pre-owned certified vehicle from cadillac dealer. the car had 650 miles on it and i truly beatiful/showroom condition. i had the transmission re-flashed, which provided perhaps a 1-2 days relief. i will continnue to persue with dealer, but wanted you guys to be aware. cadillac should fix the problem; new/different type of transmission or re-work the 8l45/8l90's with differnet vlaves/software or buy it back from me.