It is at best a gentle nudge to remind you it thinks the lane boundary is approaching. Nothing like auto steer on say a Tesla which is brilliant on motorways and dual carriageways. You absolutely can’t drive hands free, it won’t turn the steering enough to do anything meaningful.
Personally I think this is better this way as others have said, all these systems give you a false sense of confidence and absolutely, and proactively, will be happy to steer into or over a pothole without a care for your lovely alloys.
I leave it off as I find it annoying but the radar cruise is brilliant and smooth.