It works great if you are behind a car at a red light which is the only situation refered to in the 2020 manual. I can follow a car to a stop or hit the set or resume button when braked behind a car and my car will hold. If I hit the buttons when first in line at a red light, I get an error message saying that there is not enough information to engage the system. If you can find a way to hold a 2020 SEL with Co-Pilot360 Assist when first in line, I would be greatly appreciative.