I also have a Civic with the same feature. The thing is, while LKAS (Line keep assist system) is capable of basically driving the car, as soon as it does not sense driver's input on the wheel it will show warnings, and after some time disengage, so you are forced to use it as intended—an assist, not as autopilot.

Adaptive cruise control is a wonderful, wonderful thing. Mine will not work in go-stop-go mode (only versions with CVT transmission have this), but even without that it is very helpful.