99.9% of the time I use "D". "DS" makes the already horrific gas mileage even worse, and the "M" mode feels odd shifting with the video game like, joy-stick (and kinda lame, since it's an automatic). It was lame shifting with the old Steptronic transmission, but at least the gear shift lever felt good in the hand. This "joy stick" thing is really just good for D, R and Park.