From the original description, my suspicion is it’s the regular (i.e. not advanced beta) “full self driving“ package, which I have on my model 3.

Truth is, it’s pretty limited, and you’ve got to learn the types of situations where it will and won’t cope. Through town, situations with parked cars, or weird lane markings, it will struggle.

However, the flipside is that on longer journeys – with mostly open roads, it does very well indeed. I recently did a three+ hour drive and the car drove for probably 80% of that time, and without any issues at all. Once you get used to its foibles and therefore understand when you can trust it, it really is a relaxing experience.