I don't even know how to use it. lol.
DP tried to teach me, but once it was on, I was like, "Wtf?! I'm not controlling the car anymore, I don't like this," and got him to turn it off.
He whinges because he thinks it's better for fuel economy, but I think me feeling comfortable is more important... better that I lose a tiny bit of fuel than sit there freaking out that I'm going to kill us all because I'm not doing anything more than steering.