I have a new 2019 MDX with Advance Package. I find putting the car into Sport Dynamic mode makes tge car much more responsive as indicated on reviews and in the manual. However, i find that with 45 ratio tires on the Advance model, the ride is really harsh. I know the mode affects the shock / strut damping, but it is hard. When i had a non advance loaner, it was better. The loaner had same 20 inch wheels but with 50 ratio tires. With 7500 miles on my car, i am going to inquire through the dealer , if they would allow me to switch to 50 ratio tires for some sort of swap charge. If that is not doable, i will keep what i have and change tires at the time the OEMs wear out. Anybody agree with my assessment. Drive Safe.