In addition to my truck I currently have a 2018 WRX loaded with all the eyesight stuff as well as a 2020 Audi A3 S-Line with their radar stuff. Prior to the Audi I had a 2019 Mercedes (bleh).
Generally speaking of regular adaptive cruise, out of all of them, the Subaru WRX adaptive cruise is the best. It’s actually quite amazing. If it could do hands free like BC, it would be perfect.
Watch this video, the steps are important. If you don't have your hands on the wheel and looking forward when it's letting you know it's available, it will not engage. Check the video, it's helpful. Only 4 min long.