Have put on around 1,000 miles on the 06 300 AWD i bought used while it had 36k on it. Overall it's been ok. Not the best but decent acceleration, smooth enough braking, ride comfort however has been just average. I feel and hear all bumps.. i thought luxury cars were supposed to smooth them out for you? i think i'd take ride comfort and smoothness over the bells and whistles any day. the car feels too heavy.