I have a Subaru with lane-following and adaptive cruise. Lane follow fails miserably because it keeps losing the lane boundaries, even on clearly marked roads. But adaptive cruise control works extremely well, and particularly shines in stop-and-go traffic.
One catch there is that it'll stop automatically, but it won't ever go if it came to a full stop - you need to tap the gas to reactivate cruise. If the car in front of you starts moving, but you don't move, it'll make a noise (both audio, and visual on the dashboard) to remind you that you're supposed to do that. I suppose that's a kind of a safeguard to keep the human alert?
I also drive a new-ish Subaru, adaptive cruise seems to work well in some situations (low speed stop-and-go, like you mentioned) but at high speeds it is terrifying... A speed that is reasonable on straight highways is pretty jarring around curves. If my foot is on the gas I'll subconsciously make the needed adjustment, but with cruise on I don't usually react in time.
This could partly be a consequence of living in the Pacific Northwest... lots of winding mountain highways!
I'm in PNW as well. I find that it works great on major freeways - e.g. I commute over I-90, and it works great there. On I-405 as well. On the mountain routes, like say parts of SR-202, yeah, it's ill advised.
On most highways you can maintain speed through curves, but not in the mountains, and they do warn with plenty of signs. So CC is not a good fit for mountain driving.
That sounds at least somewhat workable. The Accord seemed to drop out of cruise control if the speed dropped below 15-20 Mph, so it was entirely useless in stop-and-go, and even slow-and-go.
One catch there is that it'll stop automatically, but it won't ever go if it came to a full stop - you need to tap the gas to reactivate cruise. If the car in front of you starts moving, but you don't move, it'll make a noise (both audio, and visual on the dashboard) to remind you that you're supposed to do that. I suppose that's a kind of a safeguard to keep the human alert?