I highly recommend that if you invest in THIS technology that you go all in and get the blind spot detection and rear cross traffic alerts. I have had a Subaru with Eyesight for over six months now, and I don't regret buying it and definitely like the blind spot/cross traffic alerts, they're legitimately useful day to day.
I will say one downside of this system is what I call "alert fatigue" particularly lane drift warnings, ice warnings, traffic pulled away warnings, etc. You can disable many of these, but it would be my only whine.
I have had automatic braking pre-warn me a handful of times, but not had it activate yet except when I pulled into the garage and the dangling tennis ball confused it and even then it only slowed me slightly. You get a yellow warning then red, then brake, and most of the warnings are legitimate I am just ahead of them.
Lane keep assist and distance based cruise control are like crack. It feels like you just get on the freeway, push a few buttons, and the car almost drives itself.