The only thing I would say is that unlike teaching your kid, there is not any two-way communication, and sometime it communicates the exact opposite of what it then does. The beta software will also make some sudden decisions at times when you do not expect it, partly because it does not seem like any decision needs to be made at that time. An example would be suddenly attempting to turn the opposite direction while in the middle of a turn. Or for me the other day it notified me on the screen that it was going to change lanes to avoid cones, and then immediately changed lanes the opposite directions *toward* the cones.
The way the car behaves is not subtle. An example is slamming on the brakes mid lane change. Or yesterday it very suddenly when approaching a light slowing down, right before stopping it suddenly decided it wanted to be in the next lane over and just went for it, right in front of a car approaching from behind in that lane. Yes you have the ability to take control, but it acts very quickly at times.
The biggest risk in my opinion is that its erratic behavior will cause someone else to hit you. Driving without accident is a collaborative effort by all cars together, and predictability is one a very important aspect of that. The beta software is very unpredictable currently.