I've only driven my car, but Consumer Reports tested a bunch of cars and rated Comma the best [1]. Maybe another car since then is better, but of course Comma is always getting updated and you just download the new version to your device when it comes out.
After reading a description of the comma device and how it's being used it seems uncannily like how my Mach E drives. But also as both my first EV and my first semi self-driving car, perhaps I have a different set of standards. My TLDR was that the adaptive cruise control and automatic lane keeping extended my daily driving range by several hundred miles by reducing cognitive load significantly. It was the best 900 miles I've ever driven.
But watching people nitpick various variants of electric crossover SUVs, I realize I would probably like just about all of them because none of my cars have been anything like that up to now.
So I keyed in my other two cars to see if I could put the comma into it and alas I cannot. They are 2013 and 2016 models respectively.
1: https://data.consumerreports.org/wp-content/uploads/2020/11/...