My wife's Lexus RX350 has the lane keep assist and while I *love* the advanced cruise control, I *despise* the lane keep assist.As Bryce pointed out, no lane keeping assist. As much of an advocate I am of safety systems, lane keeping assist seems to be somewhat intrusive on other vehicles, so I'm not disappointed by its absence.
You can't fully let go of the wheel - it nags you to death if it notices you're not touching the wheel, and on roads with wider lanes or faint markings, it ping pongs between the sides of the lane. It's really, really obnoxious and I'm glad my Wrangler didn't come with it.
The Advanced Cruise Control, though, is probably one of my most-used features. Love it.