The worst one is automatic brights. Some cars don't even have a button to disable it, and it's only like 75% reliable at detecting an oncoming car as to not blind the other driver.
Interestingly, for me this worked very well. On my BMW M235i it was flawless. It had normal beams, and one could turn on the auto beams. One button to switch it on/off. I really liked it, as it was easy to activate, did its job, and when in doubt, I could deactivate it easily (button).
On my VW Golf GTD (mk7) it works also pretty good, only the activation/deactivation is strange. It uses the same switch, which is used to switch on the beams. Depending on the current state, it activates the beams, auto beam or turns it off. After more than a year of ownership, I still don’t know how to use it. Sometimes when I need to turn it off, it doesn’t turn off, but does something I don’t want it to do.
