I'm going to bet that most people that disagree about the cross-traffic alert RADAR system being great have never owned a car with it. It's night and day better for reversing than what we have in the 3.
In general I find the slow-speed interface in the Model 3 to be not great. In the front you can't tell how close you are to say - a parking curb, so you have to just sort of guess that you are close enough without running it over or scraping up the front bumper. The on-screen warnings only tell you up to a FOOT in closeness to any wall etc in front or rear - which is not close enough for city driving when you're parking in tight spaces. In the rear you have an extremely wide angle camera that's great for seeing things to the side of you, but that makes things tricky when directly parking, and the lack of cross-traffic RADAR is a thing that nobody can convince me is good. That rear RADAR is also used for blind-spot cars, too. As much as I recognize this car is designed to drive itself yaddy ya, it would not have been a big deal to have something in the mirrors (NOT on the screen where I don't want to be looking when changing lanes).
Anyway, rather than beat this thread to death, I'm done.